Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76d403e56fad641…

MALICIOUS

PDF

86.4 KB Created: 2021-03-07 20:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 54eb2779e79ed77442675afb434805b9 SHA-1: 11e32465bc67e1c118148ca8241e3636a4e38acb SHA-256: d76d403e56fad6413a29156cc9ef51f23775b2bdf46b1bdd5f9d8d0ae43b821a
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, a technique commonly used in link farms to generate traffic or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it is designed to lead users to potentially harmful websites, likely for phishing or malware delivery.

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://fokemale.ru/wix?keyword=lemonade+war+online+pdf PDF link annotation
    • https://cdn.sqhk.co/gumoxixo/jhAihhg/drawing_points_lines_and_planes_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/ijjgeha/rock_outdoors_marine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403273/normal_5ffb7d06ddf72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383450/normal_5ff7794eb3de7.pdfIn PDF document text
    • https://cdn.sqhk.co/noxutuvixi/PNgcha6/xugew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_60328ff5d65fd.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/ghGIjfc/business_strategy_2_game_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/ridjcji/quran_tafsir_ibn_kathir_english_audio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368226/normal_5ff3ef23cf7a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fojiguxojed.epizy.com/zevolajoxibejaxum.pdfIn PDF document text
    • https://6e3eaeb2-b9dd-4462-8b56-96c59beebd9a.filesusr.com/ugd/dcc11b_1a85d4c3c7f545d5830ba090beeb78af.pdf?index=trueIn PDF document text
    • http://robexekipojop.rf.gd/97328456180.pdfIn PDF document text
    • http://wifepex.rf.gd/athena_goddess_of_war_ost.pdfIn PDF document text
    • http://xofopiwuwux.rf.gd/51115044874.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_c4750fd764d044eea7ed5e2afe8d7513.pdf?index=trueIn PDF document text
    • http://wexoloxi.rf.gd/low_carb_diet_free.pdfIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_40b3c9a18ba64bebb29f2f90fd0f4b92.pdf?index=trueIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_aaf88251f0f642f2ac0b44667a729e54.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_d45b95e874374be49c20d8af21397317.pdf?index=trueIn 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_off000114b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B5 5044 bytes
SHA-256: c5407b07d2c7b40581846e01cbfab74a9e60778b3fb2f057902d713429a3022e
font_01_sfnt_off000125da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 11260 bytes
SHA-256: 504d3ce5a70354553808bf9c01f183e4d88e7620564f6a877b767154a22d6a85

Open this report in the interactive analyzer, or submit your own file for analysis.