Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d275cbf983e3cef…

MALICIOUS

PDF

71.6 KB Created: 2021-02-16 22:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7343eedb587be8ee6b012a4d4af63853 SHA-1: be268cbf35a202aab6807d5817d5907e0343d81f SHA-256: 1d275cbf983e3ceff94d0b06632e56f8821ad1b064a632076194e1f25922913b
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/wix?keyword=does+a+holiday+delay+direct+deposit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393033/normal_5ffffcb02d58c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412151/normal_6026c9e866ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_6015ee9eb9b48.pdfIn PDF document text
    • https://mewuvonemifutu.weebly.com/uploads/1/3/5/3/135394867/jenijoxagiwik.pdfIn PDF document text
    • http://br1.red/58838968263hh8n2.pdfIn PDF document text
    • https://cdn.sqhk.co/fabavukunatu/gjegfii/59415690599.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/3fc67d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371265/normal_5feb2d9d20034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_6021544e8981b.pdfIn PDF document text
    • http://vinograd.io/ejercicios_ley_de_hooke2jp5r.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/Pnge3jg/twist_hit_download_uptodown.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_602b2df62e105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_6013244b93240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487416/normal_60240cbd7c320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_600d0d15cfbd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0F 5260 bytes
SHA-256: 9640e896d16bb230db224aad4d91aa25eb3aa325fb8f77ab341f2c2843bb2cb6
font_01_sfnt_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 10708 bytes
SHA-256: 324d57b3dc3af4c52a59c4447a908f0599c0d4af2f3919a6fc0459cc3ac5994b