Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e01c0aeb7b20ba…

MALICIOUS

PDF

88.0 KB Created: 2021-09-15 08:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c0081bfbf03c06bf9ceb924945baf94f SHA-1: ba7dd3cc5697f372bf20e51394bb17c04da04047 SHA-256: a2e01c0aeb7b20ba6cab6bf0b1e887abd183e7955ed3fafec6384c087e43bf64
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links are indicative of an attempt to exploit users via a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=hill+climb+racing+2+free+play PDF link annotation
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be4bda77cb---botesuze.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613488316a43d---sisunevibageduw.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e634eb4b12---jabalavakojemidomi.pdfIn PDF document text
    • https://granitnet.hu/editor_up/92694519251.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/41856928878.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/88affaf643b098ed737fbfc70d49c8c1/danigujusavunavamazi.pdfIn PDF document text
    • http://epmachine.ru/d/files/zeveziparekosulutitusoxo.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/sobevedoruza.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/78453263576.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/52995399571.pdfIn PDF document text
    • https://ever-progress.com/upload/files/lepuvawumiwe.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/duvevativuwikemiwopimoxef.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/zakobe.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/46586307644.pdfIn PDF document text
    • http://esejsc.com/upload/files/69065146290.pdfIn PDF document text
    • https://n-tlg.com/files/file/80395695969.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/1000154906.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/59883950364.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161330c65e35b8---wolutarivakarenexedimolo.pdfIn PDF document text
    • http://kesifveotesi.com/files/tezubetivagenapisagozuwi.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/75549995458.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/luvazaromemet.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/kexilifew.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/5744762153.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_off0000f254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 10800 bytes
SHA-256: dca090016d8dc0d0aaeb2e119fe0d130e08f4f5e47df055e50d0cdb1a388c1bd
font_01_sfnt_off00010af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001230a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1230A 17940 bytes
SHA-256: 3a2df341d4815aae830dcf8dc75b56c188e4f1065eac720ee618bda2649e0c78

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