Malicious PDF — malware analysis report

Static analysis result for SHA-256 69badfe85f1058ab…

MALICIOUS

PDF

99.7 KB Created: 2021-07-16 11:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c5ce664af7631af0affd95467ae97e33 SHA-1: 06f6f22b8fd79352fae297e7ce98b2aad8a11a5b SHA-256: 69badfe85f1058ab12790da3d1e53ed7920acfe9577ff051c4e8dc1462a151c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of embedded URLs, many of which point to compromised CMS uploads or are part of link farms on disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the extensive use of external links indicates a likely intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://crewmak.ru/uplcv?utm_term=inheritance+meaning+in+tagalog PDF link annotation
    • http://blpest.com/UserFiles/file/8424565791.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/ribuduzonekezidigikibe.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/73349086570.pdfIn PDF document text
    • http://kinocosmik.ru/sadm_files/82844554757.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bb2d999f6---mixofimajipexuwuv.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/i4migf4hrqq6sjlkedn49l16v6/gojokujepetelizirad.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/dmf7jhp01h77es9jkr5cdeg2r4/zetesogebelonogerojedon.pdfIn PDF document text
    • http://tatishev.ru/admin/ckfinder/userfiles/files/xixore.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c1c1ce507---rabarorurapipojav.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/rilumt71l4sif5pqabvojrqmsg/50325620718.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160af66ec391e8---7457169274.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/62511823210.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afa8a14272---baxoz.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/894f902bfdf1a59b28ae833faaadf002/94051661585.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/131224111004.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/32134375163.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/waxonimibegifukunokesinu.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d91493360d---fupavis.pdfIn PDF document text
    • https://ksuskalology.com/images/file/11113640667.pdfIn PDF document text
    • http://didopack.com/files/76871403248.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d3621cb6c---vaneralafejesatatogusum.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/41022658378.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFC 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_01_sfnt_off0001200b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200B 19428 bytes
SHA-256: 2ec6b917290b2c1d96cde834af96dc85a4121609f3b3012f6f9592adf2af5510
font_02_sfnt_off00015191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000169a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A8 10460 bytes
SHA-256: a2bb71620462b99f267eb1a000eb825090e9d8d7d58bc8f8d3c4638e2bf61e55

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