Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b6c8ce8da3d0108…

MALICIOUS

PDF

71.1 KB Created: 2021-03-02 19:22:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3f025fe20e5e1d0b8b97f3a5c2a198f3 SHA-1: e7c7b6f87f77de10e940807e97f3671c9fd41cec SHA-256: 7b6c8ce8da3d01084b11c6a65ffab8563ada686b09290ede50ffbb9751510129
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/award?keyword=starbucks+holiday+drinks+without+coffee+2020 PDF link annotation
    • https://fekoguto.weebly.com/uploads/1/3/4/4/134491689/1462391.pdfIn PDF document text
    • https://kilixezexixoz.weebly.com/uploads/1/3/1/1/131163494/pumokimopid_kilumuxajep.pdfIn PDF document text
    • https://wavurujubatebar.weebly.com/uploads/1/3/2/6/132682053/wovirobeje_wexir_sanegodit_mameliposogu.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/jJBgggg/artificial_intelligence_movies_2020.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/be9a508a8.pdfIn PDF document text
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/mamazexosureveji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5fd15c84d1c8e.pdfIn PDF document text
    • https://verigidiloje.weebly.com/uploads/1/3/0/8/130874422/05ec1.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/itgjehb/drive_lube_monitor_sea_ray.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kegigija.atwebpages.com/69210985817.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/car_seat_guidelines_pa.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/93417432745.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/punctuation_guide_ellipsis.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/vojikewabijugasaxometij.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/24759981168.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86F 5884 bytes
SHA-256: f47d8a2400b2879560d289f9886065a3de9cc046032a55758951ad5894368b06
font_01_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 10240 bytes
SHA-256: bac65d39bc87d84ee4ba369ecbb89bec18a43b2561fa3299de0690f754b47411

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