Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ea85e9bd197406…

MALICIOUS

PDF

71.6 KB Created: 2021-01-25 20:45:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: bdaeba244055ff282b13c7af7a23b3c6 SHA-1: e84c18f45e160b1b5c2473e158d6b6854c363a75 SHA-256: c5ea85e9bd1974065bcf26c995bb7359cbab65d4eabb7e0e6d55120d753cb3b6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://seumenha.ru/aws?utm_term=mobogenie+android+8.+1.+0 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486033/normal_6001c6fe21043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_6008953dde1f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505102/normal_5fe012570c8b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425738/normal_5fcd25810adab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fe223f26b199.pdfIn PDF document text
    • http://osmosiotzs.fun/aavin_milk_manufacturing_processbjnbz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414341/normal_5fe16a70b64dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404725/normal_6004c58a61503.pdfIn PDF document text
    • http://brettlockhart.com/leraxeruxomuguzirgeioy.pdfIn PDF document text
    • http://teasmall.space/827269563803d58b.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/1781959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/defujo/sujaxasene.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/pediatric_chronic_sinusitis_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/free_mi_store_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/70267664735.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_off0000d9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FD 5348 bytes
SHA-256: 656ca375332acc636911db2d80e4810e1aeff9282fe4aa49f25fbb8050003640
font_01_sfnt_off0000ec4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4A 11012 bytes
SHA-256: d18a27b20f4b8cd443f982151d96861e42c542a49e471d4f134fbc87bb4ed5aa