Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d0fbc558138114…

MALICIOUS

PDF

74.5 KB Created: 2021-05-18 20:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 902fb9abe37d31879ecba10ffac4fb9b SHA-1: fa635d04f681ea9fcd3b71fb7fe8738b6df14570 SHA-256: 75d0fbc558138114b9b955ee2d924a840c7d5bc5c72112e338087d215ad4181e
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by multiple heuristics related to link farms and a high ML classifier score. The document contains numerous external links, many pointing to disposable hosting, suggesting an attempt to obscure the ultimate destination or distribute payloads. The ClamAV detection and ML score strongly indicate malicious intent, likely to redirect users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/strik?utm_term=camp+rock+2+full+movie+download+720p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445889/normal_600b67549de18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_601481de79d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_60230510ebcba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492593/normal_6008d6686ec40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413475/normal_5fcb6dbd17d8e.pdfIn PDF document text
    • https://jomufoxubibad.weebly.com/uploads/1/3/1/1/131164047/dalep_vakemofuzopuse_kivajuputar.pdfIn PDF document text
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/mavopovatekibon-bubarisuligag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456999/normal_602212a8be17c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449000/normal_604dbbd5524fb.pdfIn PDF document text
    • https://zinixukugezevul.weebly.com/uploads/1/3/4/6/134612333/6936817.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://telimivakapot.epizy.com/sanitary_fixtures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0656686b-e478-4c58-b80f-37f5f14adec2/how_to_fix_whirlpool_water_heater_pilot_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2edb1061-39e7-4c7c-ab48-7dd9aa4410d7/5827179626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce99342-0195-4a67-9721-f87e2ce3d0bf/73327426145.pdfIn PDF document text
    • http://lijabefenuzif.rf.gd/clases_sociales_en_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7edda6-65c5-486e-8d52-4a3ff8a7e6be/vatirofojimevuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d95885a-33fc-422e-868d-58710293e6c7/dimugeveviwojed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8850a4ec-9671-4619-8bdd-59db83f4e5a4/jalefeboduxixafa.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_off0000e53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 5596 bytes
SHA-256: ed8d423d7484a52c300f9576781286090dbf218f1654a55ebab13e0da9d8f4ce
font_01_sfnt_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 10528 bytes
SHA-256: 49423f64a9548ecae1426568a83d69ec789180e34b2232da6f90e63c251f65f3