Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0757724ab58476…

MALICIOUS

PDF

76.3 KB Created: 2021-05-01 19:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28bfc55f8b164395edcca58a4080a2aa SHA-1: a0129fddec468d6fc163430a7837745e4825abc9 SHA-256: 9b0757724ab5847644f11d6b2834be6f4ec73e48d803d34e4576de7deeb361eb
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of a link farm designed to direct users to malicious content. The document body, though partially obfuscated, appears to be a lure related to a search query, further supporting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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 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://lozipotod.ru/strik?utm_term=cuanto+son+10+pulgadas+en+cm
    • http://nojigopagapusu.mygamesonline.org/cardiac_cycle_file.pdf
    • http://kiritisivasol.mywebcommunity.org/97263303546.pdf
    • https://jijobowuzum.weebly.com/uploads/1/3/4/5/134590228/bb2374e208097c.pdf
    • https://ditujejogax.weebly.com/uploads/1/3/4/0/134042551/jemifag-zumuxuwumim-mojuwaza-xilizijopuzarun.pdf
    • https://bivovipolever.weebly.com/uploads/1/3/4/3/134347360/jegemidafi_seniwara_bibikamut.pdf
    • https://ketafimevudo.weebly.com/uploads/1/3/1/6/131637081/fitos.pdf
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/bebovedujoxodinupe.pdf
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/jabutitibal_sileredubabijij_bisujipa.pdf
    • http://sidazolomaw.22web.org/blanche_monnier_book.pdf
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/30990857681681.pdf
    • http://luvetikemo.66ghz.com/nios_bridge_course_assignment_front_page_download.pdf
    • https://bapajoronugenig.weebly.com/uploads/1/3/4/2/134234589/3070950.pdf
    • http://aicberg.net/free_video_download_youtube_june_20164chy.pdf
    • http://nubokokepiw.iblogger.org/maryland_advance_directive.pdf
    • http://fabulouss.space/jobujijiletey8wnl.pdf
    • https://zupalopozaguri.weebly.com/uploads/1/3/2/3/132302876/vukubunimebajadodel.pdf
    • http://yandex-delivery.cc/basic_technical_mathematics_with_calculus_si_version_solutionsqtspx.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/donake/dofagura.pdf
    • http://dudorotedebapoj.epizy.com/career_counselling_definition.pdf
    • https://s3.amazonaws.com/nitizobuv/fatovevipu.pdf
    • http://pezefaxovojole.atwebpages.com/86859414926.pdf
    • http://sogivuwe.onlinewebshop.net/67317637862.pdf
    • http://bikikifuxax.epizy.com/befapemugigafaki.pdf
    • https://s3.amazonaws.com/xanunafojuloki/xawoduriwulaso.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7f.bin
e8f3492b7c900515afc06ed537adc0c4ec5a461047f79f54e7023668755c09fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 5396 bytes
font_01_sfnt_off0000fccb.bin
52d7e322db256050e17426356e2ada946ed7c3320358181090f77315724ac4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 11540 bytes

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