Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9f1fcabd6bde33…

MALICIOUS

PDF

74.9 KB Created: 2021-03-16 01:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 679448a12ed4b22fab51dec4279eedbd SHA-1: 90bd961d9d81b48f68c4a1be77232f50f6ae52da SHA-256: 6e9f1fcabd6bde338025192f679b75f197fd3e9a11b2c35c887a2a9188a3d8ef
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://zajinet.ru/wix?keyword=dna+fingerprinting+worksheet+answer+key PDF link annotation
    • https://baxugufidet.weebly.com/uploads/1/3/0/7/130776886/wanezukafage_bajiwawiras_dusegil_zovuposa.pdfIn PDF document text
    • https://zavomejuguz.weebly.com/uploads/1/3/1/1/131163615/loxedewenavivim.pdfIn PDF document text
    • http://bafutazipavev.iblogger.org/how_to_fix_pixelated_pictures_in_paint_3d.pdfIn PDF document text
    • https://kimilofu.weebly.com/uploads/1/3/0/8/130873947/lexuwuw-gaximafubexidu.pdfIn PDF document text
    • https://wogizirimabote.weebly.com/uploads/1/3/5/3/135337148/tivekebivifige-dewadejer-zosoroser-gusan.pdfIn PDF document text
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/d2225d8717e691.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/burger_king_menu_specials_2021_south_africa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_604cfe996632b.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/0898c8605.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/medida_cautelar_definicion.pdfIn PDF document text
    • https://famosufed.weebly.com/uploads/1/3/4/9/134900490/liwosabe-lemabuwubosa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5fcacfc099b82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385620/normal_60059fc14e5d7.pdfIn PDF document text
    • https://muwegegedagus.weebly.com/uploads/1/3/0/7/130738526/dumegi.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/scratchjr_projects.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://namepafubi.atwebpages.com/how_much_weight_can_a_malm_bed_hold.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/reporter_salary_us.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/fobetugitixowebeletuvosi.pdfIn PDF document text
    • http://fetufebutegiv.rf.gd/nesevosagukedamavi.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/amma_bhavani_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/66089675898.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_off0000e6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DB 5388 bytes
SHA-256: bffc6747665163597e3abc85783256adc493cd97730664530889c2968edf9e5d
font_01_sfnt_off0000f952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF952 10908 bytes
SHA-256: 2a29874fb22a67417f1bcd4782045dec341a054666568383c2fd03a8a4135a50

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