Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ce3949c9d900bba…

MALICIOUS

PDF

101.1 KB Created: 2021-07-18 02:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1e0cafe4acb8bb855015ef157c94b3a9 SHA-1: debfcbb441c302e293c52debf78d172bdad18aed SHA-256: 8ce3949c9d900bbac3eed122bdc31ae5a23ec9ec283ec67bc48bb3c6e05f668f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URIs, many of which point to compromised WordPress sites and utilize disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9767

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/eq831jj1rti9dka3a05dns2fg2/42073152385.pdf In PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/divazap.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/xukirosuzibal.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/rijc9bouo0sc4540r8ua9bt3tv/xonovikapovivopojul.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/tk9e52t597gv23lbhe24od79b4/kaxifatigu.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/59205391764.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd48a02ccb---vijavodiwejuravul.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7a34e7873---betipero.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210621031554.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/41305651961.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/88309238725.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16074b93cd3812---88526619077.pdfIn PDF document text
    • https://andrejc.si/files/file/77038168683.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/s5ft72up9lvmt303g265a2iro2/bozafarikido.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/zilezilijifawuxuxunu.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/5817474909.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/95827069792.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82ad4bf672---didakomepokovavalotoso.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/fepadapigavo.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/59244507109.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/nou9udckmcjia0omjj54899a51/nufuzixado.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b626570d2ca---vakotomulavu.pdfPDF link annotation
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a42fde67a3b---40579988086.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b48855b721c---merana.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/c15b34b2bbcf416ccc0b136368a09f13/69961652030.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=hysterically+meaning+in+englishPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f7ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF7EE 18904 bytes
SHA-256: 95faeb90286ba2a7a3f22c534f375cbc3892ebd95b63bf8439a208833d6fe8b6
font_00_sfnt_off0000e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 4984 bytes
SHA-256: 14190c54742b234d40199ab3563aea21f253b07a3bff80931a0eccc00d06ad38
font_02_sfnt_off000116f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F8 10664 bytes
SHA-256: 0bc48b3e3c2391015229176f32429b5910fd0f5462335b09d35ca7a2a6a1e0e5
font_03_sfnt_off00012f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F29 25040 bytes
SHA-256: 13f89333e1b237db05bd3d2b9fa3ebf4d513bec3ab223f358a42eb4dde5362cb
font_04_sfnt_off00016c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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