Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af3c1a44e0d54fc…

MALICIOUS

PDF

71.2 KB Created: 2021-09-07 05:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: adf565dc4c786e2c5e1d2237e2ab64a6 SHA-1: 6b32dac24af408f9fa35e0dd49b1e4e23727ba8d SHA-256: 5af3c1a44e0d54fc8d74a2913adbffa03f3622e4198702add140310f12018b87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://pixomot.ru/uplcv?utm_term=autobiography+of+a+yogi+bengali+pdf+free+download PDF link annotation
    • http://anhuicrew.com/upload_fck/file/2021-5-21/20210521070120281818.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f30eff1120---fovokewamobudaxolana.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/206cc020b42f87f27ddd53efe6cdfedb/roxogepizelawabesozu.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/88243137522.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210801183602.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ffec4a3c6af98fb0abc53896b957f4c4/83132985933.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/20908903319.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/fubulegezut.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a515cd1dc4---35162244261.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b32e88c282---wasaruletifijufakewofubal.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5e904f0deb510654fbd42a1a45d563ea/pekikiwataso.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/wagiditivizidazusojan.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/47776968355.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/91019383854.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/zipap.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b20820d428---palebopebu.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/63644860062.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/34377b0a5f4d6d7f1668bd56ec46ff1a/jexejogim.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/91297ee6a2cbd59df368b12c3f6a2482/9233794279.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/jamafafilemuxebebe.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/dogixawuvexakusum.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/18922633183.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/70744569725.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/10701062489.pdfIn PDF document text
    • http://suacona.com/clients/16856/File/26235722638.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB64F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE61 15432 bytes
SHA-256: 123f2e156b803f55ae3ae22fca1f02a42133db74a4c3d1d205863ad2ad89a7bd
font_02_sfnt_off0000f5b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B0 11032 bytes
SHA-256: 07ed1d21c65ec49424985c1ca9eb139a68f738fadc826804cfc9100430f19dab

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