Malicious PDF — malware analysis report

Static analysis result for SHA-256 38897c519a6635f5…

MALICIOUS

PDF

175.4 KB Created: 2021-07-30 18:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: baac2c082cddd03579ed1ad66d3dc632 SHA-1: d2a0eb9af294b1110d5833f483f8c101725819c8 SHA-256: 38897c519a6635f500a6cd5eede581faa7364f6befee93c4e316c0f8994d5f99
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is a phishing lure, specifically impersonating Microsoft. It directs users to a malicious URL, https://chcial.ru/uplcv?utm_term=how+to+get+free+money+in+car+mechanic+simulator+2018, which is likely intended to steal credentials. The document also hosts numerous links on compromised WordPress sites, suggesting a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://chcial.ru/uplcv?utm_term=how+to+get+free+money+in+car+mechanic+simulator+2018.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/uplcv?utm_term=how+to+get+free+money+in+car+mechanic+simulator+2018 PDF link annotation
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/22513ccdc35852ef683ab9e00665d25a/pibodenitudu.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/68236916063.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/8ddb7fa5aeecdd2bc00b8564e7427838/24392451496.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bad6cd3b66aab4d0e6a3e81165178065/ravodunufegowukoruvikuk.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/45262016511.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dc9073287---sukelabaduvopafefukukokav.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a534de3841a---40117374525.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/f03f427bbc0746ffcaf755cc67a76619/fomedalewememagiramelu.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/60824499003.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608123ffe0e4d---dofufubokazew.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16093cd36bb10d---4245668331.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/jituwarozamat.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/katemidilijomikenafekowe.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/jexat.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/25232341864.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/91487218405.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/92659772473.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/1o1tsaon360kn7upfqc32s1l92/gurefidevorepagukogafuta.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769faa803d0---gexenidapuziluguwubenuvuf.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/buratedere.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/baf2f6730136443f5956346177ba3887/gowejezuwitixeti.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210609032937.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/tiwelidunobosazusobe.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/059055de3aee42ed210c67bc2bc9ddae/68879655268.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24940 18408 bytes
SHA-256: 5ab87eeb030601eb1f09b409a9966392b131bdc6f1e849f88306bd792817bc1c
font_01_sfnt_off00027a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27A1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00029235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29235 11576 bytes
SHA-256: bc0cb21a8d03cd72755e14cc54d0ca5d7b2c35064b5bd31af70f9bbc93a63c75

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