Malicious PDF — malware analysis report

Static analysis result for SHA-256 22af48bc369efb32…

MALICIOUS

PDF

114.9 KB Created: 2021-07-01 00:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7f4a7d2ed0eb50169779922dec74bf24 SHA-1: 98ee6e1754b3bb3a7aab69e7f12adb278b91e37e SHA-256: 22af48bc369efb327d5533ba9a30d510e52e7aaea62a70cf2a11e3ff975e12a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://mhs69indians.com/clients/864804/File/kifovevotipum.pdf In PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/66d52rh3lc6als496ajkorhbm5/voxanosijifizalutetuve.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ib6mkdfakrs1d5ss3u6s7bgdp7/samifinol.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e334c6887---10766749333.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/tidigofovomuji.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3a6800c2a---viribaxatuguzafolar.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/14503725276.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/jirawiwofa.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/79ccf9d7b555c9656793333dc1e3baf5/fabonozinugekesakadoguxu.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/80393497580.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a03647f9e---96839203719.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/i634asbv7i71q51p6qf0io25ve/lovupeleramixumevapog.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/44730724665.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/97a0008d3f10d1eb637fb46489da2c9e/bomavuvirumatewarewab.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609836e7a0362---37327638576.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcd46bf23f---12330906094.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/zigebutejorebebuponagi.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/c09f5dcm71mldpb9slmu8uvtao/36569091383.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc03b46995---saxigatigidesurawezinaz.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/12035887126.pdfIn PDF document text
    • http://asfalon.com/__files/file/taxovajiguxevenavalalib.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/fdaf8e16ddba92776bed863f75f66972/11398205092.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/dazumezurobirijepepap.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/18168371414.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=a+cone+of+height+8m+has+a+curved+surface+area+188.4+find+its+volumePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14492 11476 bytes
SHA-256: 51cbff2621e76db9740663178d32eac92914356de88d9081d363869ff6e26a8e
font_01_sfnt_off00015f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F77 17980 bytes
SHA-256: 09640fc685dd7d61bae21fedc7ac100488b9bafb3712c6bc9c4f137d81f73056
font_02_sfnt_off00018f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F1C 16284 bytes
SHA-256: b1769a10cdb4071b7b2cd9ec1c9e0fa19d1f07005236f5bc39e4e95fe02733a5
font_03_sfnt_off0001a526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A526 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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