Malicious PDF — malware analysis report

Static analysis result for SHA-256 f068f0bab91581f6…

MALICIOUS

PDF

92.0 KB Created: 2021-02-14 09:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cd68e2d3dcd53133b3d9ecda6cb05c64 SHA-1: e1e75cfd3a1fde8c4a3ac0fa57142bb6f44044b2 SHA-256: f068f0bab91581f6e1d8fc814d5806517af45f1e0c8851f87d194e52aa8c1704
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external links, many pointing to disposable domains and Weebly hosting, indicative of a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious attack pattern.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/wb?keyword=formule%20d PDF link annotation
    • https://mupasifuv.weebly.com/uploads/1/3/2/6/132680827/pigumowepinasa.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/iizPhcv/smart_connect_fishing_reel_walmart.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/bunuxapedi.pdfIn PDF document text
    • http://natgood.space/gijaxolagezn92l.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonotiso/gegjXhj/sonic_vs_shadow_space_colony_ark.pdfIn PDF document text
    • http://dvertsoff.ru/beginner_hand_lettering_practice_shez2cyw.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/sugirebuxafuxokedexamufidg4r6o.pdfIn PDF document text
    • http://hermidkovo.info/manual_for_bernina_800dl_overlockercgqpv.pdfIn PDF document text
    • http://canonsburglake.org/ken_tech_clock_manualbcwoa.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/hdQheih/91251463054.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/gifGgix/45309455501.pdfIn PDF document text
    • https://benanuvez.weebly.com/uploads/1/3/0/8/130813453/dcbb0bf8fb2b78.pdfIn PDF document text
    • http://hr-insider.com/danaxa2irpy.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/jesizid.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/3374058001tvqzt.pdfIn PDF document text
    • http://extraterrestrials.space/884030799558qylv.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/hiMBgf5/best_us_pop_radio_stations.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/xukirizugukugi/24515299574.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1B 5176 bytes
SHA-256: 7a33ed515125c3e2e98163dac770065ec61d87909134aee660169c7e2b5bae78
font_01_sfnt_off00011cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAD 14588 bytes
SHA-256: ef16ed3aba10590d3ab062678fcc3f0df9c62364d26c0b49421da537869e00ed
font_02_sfnt_off00014a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A21 16488 bytes
SHA-256: 62983dd010b7aa238131a5b5fc9b5234e97605aad009cac054b686215e957981

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