Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2679bd2b20104e…

MALICIOUS

PDF

85.2 KB Created: 2021-02-06 03:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d90f440dc4efade8ba4420d836a91efc SHA-1: 6bc4a62ae7ab33cfe17de96901509e367ff23454 SHA-256: 4a2679bd2b20104ed5f24af0971c729556fd3dd6155c03a17dbcdc67dbed3e99
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=remstar+c+flex+manual PDF link annotation
    • https://cdn.sqhk.co/lorotukogof/hbhf6gg/zombie_castaways_secret_island_walkthrough.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5fd79cef618e4.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/seluwefudol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_600fc2b9043c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448558/normal_5ff27c355223f.pdfIn PDF document text
    • https://zugasunisozabij.weebly.com/uploads/1/3/4/7/134759734/sazuw_nedodubakeja_tatow_denatejabekumub.pdfIn PDF document text
    • https://nisudine.weebly.com/uploads/1/3/1/4/131454656/desinafubavozow.pdfIn PDF document text
    • https://zedetebi.weebly.com/uploads/1/3/1/0/131070456/d1c6f.pdfIn PDF document text
    • https://buparemekixa.weebly.com/uploads/1/3/0/7/130739227/6066107.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/rekawexuretowo/bhojpuri_ke_gana_dj_me.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/eagle_circuit_simulator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/43361628926.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/vatulumugenisobo.pdfIn PDF document text
    • http://tununik.epizy.com/1116142638.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/chimani_pakhar_marathi_songs.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_off00011014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11014 5104 bytes
SHA-256: f0d36f4e44b03ba08dc0043f18fa6676f1334ebd55caa62b8a28066b237aa7d5
font_01_sfnt_off0001215c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215C 11800 bytes
SHA-256: ed9a29920be06dcc0223e7df0f8a441fba53cd1e485248a14a460f6b33dfd6f1