Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd3958e87139d7a0…

MALICIOUS

PDF

61.6 KB Created: 2021-02-13 14:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 51b3ec386a0271d68574ac15c50879b2 SHA-1: 944e0ce16ab3d83ed9f08e3ea28c45f74cf65e25 SHA-256: fd3958e87139d7a0f5d5c1a643f0bf9e049aea33fa52c5b8bfd47e94b999dde9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=magic+quadrant+for+data+quality+tools+2018 PDF link annotation
    • https://cdn.sqhk.co/livefivepa/qKJ0jdk/47027751268.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/fgfgfyJ/tados.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/gLjaihe/20449911632.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/79be6f.pdfIn PDF document text
    • https://cdn.sqhk.co/rukokota/iaiaqig/tamivetibox.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/jefhivS/ruruxugikolusivemugekim.pdfIn PDF document text
    • http://marafonsport.site/calendario_2020_para_imprimir_gratisveb74.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/wjeO9gh/hornblower_cruises_san_francisco_brunch.pdfIn PDF document text
    • https://cdn.sqhk.co/vefutifeves/Xji1smC/crosswords_with_friends_cheats_10_17_20.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/gdO7gig/zumasora.pdfIn PDF document text
    • https://cdn.sqhk.co/fidumugovoz/aU1giib/bexewefezoramonifisuvin.pdfIn PDF document text
    • https://cdn.sqhk.co/jusitufugaf/WhgBhiN/ludo_neo_classic_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/gjficid/hitman_sniper_rifle_sapienza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vezoxonu.epizy.com/75068172703.pdfIn PDF document text
    • http://povaxuvibilab.epizy.com/durakejoniwevapefifipad.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_off0000b2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AE 5944 bytes
SHA-256: ad96fed9209e314ee18b135d1f6b36fb9b5e499e8e743b64aea1f8538e84adb8
font_01_sfnt_off0000c706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC706 10196 bytes
SHA-256: 2b46eebd3f98f6ae077586965051ec4cd2477e7b635761d9ab7dbd6673af725d