Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e20d67bb0df214…

MALICIOUS

PDF

89.0 KB Created: 2021-07-20 10:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f17be10195ccd6d043a6354a5dfe8c1a SHA-1: 1eec80473b95d2f58f5dcdbc3a480ab12add37b3 SHA-256: a0e20d67bb0df21478e23c7148753c951ec6895dfc712a731732efa5ec133321
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also functions as a link farm, directing users to multiple compromised websites, likely to host phishing pages or further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://progfin.pl/userfiles/file/nadetarubadevedeje.pdf In PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b7613428087---gexabinonakap.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/xobezatuwevuziran.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/9578483743.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/mamipasogafogeduxunuwobo.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/duxoxunafozot.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e3e75d9a9---69685614320.pdfIn PDF document text
    • http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/62227070456.pdfIn PDF document text
    • http://ashioke.com/images/library/File/kipigalilufekej.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/240mrdvqufv83519oaubeosuij/jesoledot.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0b5b8b4c---xitafilewuzalevawofes.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/c6f51dacc3ac69ba4ab9ea14f347472b/lupam.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c43a260c804---88171430354.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/44890910497.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/jowexekodepibode.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7dea2128d---geniwudumitadoluloj.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/ximamupu.pdfIn PDF document text
    • http://signaturecruise.com/js/ckfinder/userfiles/files/walirenidakog.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a8e636e48b10f22a92b58e137a6897db/lodiwemufikapo.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/81390011463.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/6053e9454ece785f79c6eb8220279759/30365022814.pdfIn PDF document text
    • https://www.crqp.ch/ck/ckfinder/userfiles/files/rarudopinelidaxat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=importance+of+bank+regulation+and+supervisionPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E15 11312 bytes
SHA-256: 4fb018fbb72e1045afe0e6fbb6571b57a01b002e95c75a85fd2bd948f5d3a937
font_02_sfnt_off0001283a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283A 17832 bytes
SHA-256: 281d811dcd06ad72cb4d67d5ddeb4d928cbc8d53a40bed4d4543d55a7d99ca3c

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