Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f7d1091eabf2b9…

MALICIOUS

PDF

74.3 KB Created: 2021-02-16 06:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0d54acf5cb449eb966cd6eea7141d18b SHA-1: 7ca3bfb2b088a94c4d29e14f7867db836cc8dd81 SHA-256: d9f7d1091eabf2b90a862900587f361709d9ed7ce1926aaa6b9616eef99e975d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It functions as a link farm, containing numerous external URLs, many of which point to disposable hosting services. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jottigo.ru/strik?utm_term=oster+hand+blender+reviews PDF link annotation
    • https://musokuvezuref.weebly.com/uploads/1/3/1/8/131871850/kojikabezub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_5fe1802702e19.pdfIn PDF document text
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/9875232.pdfIn PDF document text
    • https://xevekarisugi.weebly.com/uploads/1/3/4/6/134697334/7450893.pdfIn PDF document text
    • https://begafirezudafo.weebly.com/uploads/1/3/1/4/131438667/cd117ffd6b1aab1.pdfIn PDF document text
    • http://ontrade.top/dead_man_walking_theme_songnehgs.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/nezugimisuve.pdfIn PDF document text
    • http://lalashoppen.online/78234110157oydjm.pdfIn PDF document text
    • http://starconflict-game.ru/valores_de_los_signos_vitales_normales_segun_oms5dn72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461249/normal_5fc99435c89ee.pdfIn PDF document text
    • http://joy-todays.online/pillars_of_eternity_game_guidecrdln.pdfIn PDF document text
    • http://gaydating.world/17252925217juje6.pdfIn PDF document text
    • https://pugulewex.weebly.com/uploads/1/3/1/4/131406013/7380017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_600aae7c1e749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450864/normal_5fd218380e08e.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/fosagobomap/arnold_chiari_malformation_type_1_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/abrahaminte_santhathikal_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/tata_sky_mobile_app_free_apk.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 5232 bytes
SHA-256: 197eeeae2fbd3aaf518e2eaa8bad2642eac7a006c437366c4623adc8855d754c
font_01_sfnt_off0000f446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF446 12064 bytes
SHA-256: 716826ada563a6df3ad849c67fdef0173ea335f677b2b42a33c390099dfa220e

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