Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba09a8da257a4cb…

MALICIOUS

PDF

69.5 KB Created: 2021-02-11 10:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 956ad7c5a93550ee23d405b66ceb301d SHA-1: e23d87146e5825a0f9a8f0994fc9b787250472f1 SHA-256: fba09a8da257a4cbfe9364ba25faba42aacf8209fcf7228b3d2a02e34b0675fc
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/wb?keyword=second%20hand%20dough%20sheeter%20uk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484375/normal_5ff38bc8332b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466153/normal_60003badc0934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_602091fecbc92.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/godozitu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482012/normal_5ffba04422466.pdfIn PDF document text
    • http://kewisanoxiv.66ghz.com/wupuvefesedopowam.pdfIn PDF document text
    • http://skameyki.club/sia_chandelier_sheet_music_pianoqf88s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495860/normal_5ffebe2763daf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378390/normal_5fcd6e3745194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_601394171bb81.pdfIn PDF document text
    • http://discovljzg.fun/street_soccer_flick_hack_apktrbh4.pdfIn PDF document text
    • http://qrastenmap.online/archimedes_information_in_englishxi5jy.pdfIn PDF document text
    • http://dedotiroviwef.22web.org/bangla_live_tv_free_software.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafopazam.epizy.com/98170127035.pdfIn PDF document text
    • http://zapofekeba.rf.gd/neverending_story_song_sheet_music.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_off0000d3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F8 5336 bytes
SHA-256: d5c7b32fe11c28ab145842379accf99216d1fc3dac585e2279032968be501d96
font_01_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 10372 bytes
SHA-256: c2810bfe5b50a7364c5adcb4ae7544653a4b44da99a6cda9e3678454242cc7ba