Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f847f243b999f49…

MALICIOUS

PDF

71.6 KB Created: 2021-02-17 13:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0b1f43f8174a029bc6d487318daded02 SHA-1: 9002f2e10c44ad97ef6159e27edba94580c4bd23 SHA-256: 7f847f243b999f49261e92d32243fcf57f0dfd5c4efe61dca7ce570ddac43601
186 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.
  • 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://leonvi.ru/wix?keyword=biology+concepts+and+investigations+5th+edition+pdf PDF link annotation
    • http://beststudent.space/male_anatomy_drawing_guide42j8m.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/8942845.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hagfoia/81689547313.pdfIn PDF document text
    • https://wupizesave.weebly.com/uploads/1/3/4/5/134581048/liwagajevatisejadog.pdfIn PDF document text
    • https://buzezofolo.weebly.com/uploads/1/3/5/9/135964700/cb53881d.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/jjljeFi/download_uphill_rush_water_park_racing.pdfIn PDF document text
    • https://kitomejefu.weebly.com/uploads/1/3/4/1/134108571/e021c61db08b485.pdfIn PDF document text
    • http://tersq.fun/galaxy_invaders_alien_shooter_hack_iosbk0ld.pdfIn PDF document text
    • https://cdn.sqhk.co/fakosopalo/fkvMje6/38958551048.pdfIn PDF document text
    • http://hhizmet.com/xukabefogivazojilakolu8adff.pdfIn PDF document text
    • https://lurofigugibax.weebly.com/uploads/1/3/4/6/134686006/nimijesevag.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/wugeti.pdfIn PDF document text
    • https://cdn.sqhk.co/rujosupatebu/iUhghbF/best_slayer_master_osrs_2019.pdfIn PDF document text
    • http://xubozogafajus.22web.org/93895585052.pdfIn PDF document text
    • https://cdn.sqhk.co/jezumasulej/hbnficT/pumugiduniliropanosewugix.pdfIn PDF document text
    • http://ketadiets.site/95981633108sl0cw.pdfIn PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/8080310.pdfIn PDF document text
    • https://najovukuno.weebly.com/uploads/1/3/1/4/131453374/7291679.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/IuN2hhN/15140258427.pdfIn PDF document text
    • https://biluvumilu.weebly.com/uploads/1/3/1/8/131860938/9333160.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_off0000da2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 5656 bytes
SHA-256: e282f84b695d30f3bd8f345815df1bec114cec1e7de877a2575943bb20a357fd
font_01_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 10256 bytes
SHA-256: 109486651261d0588eaa8848725adda59c8d9f66bdb5099c6e180508825fdb7d

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