Malicious PDF — malware analysis report

Static analysis result for SHA-256 13fec81acfbf71d3…

MALICIOUS

PDF

91.9 KB Created: 2021-03-30 06:06:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0ad76e8aab41663e53bfca4ba394ae11 SHA-1: 4b29f9ea1b94f02e11348f33a1c1753094319970 SHA-256: 13fec81acfbf71d3ffbbc189352a776652d0f0317035075362c657328469c63d
126 Risk Score

Malware Insights

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

The PDF file is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm on disposable hosting. It contains numerous embedded URLs, many of which point to suspicious or unknown domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'water borne diseases in pakistan pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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://fokemale.ru/award?keyword=water+borne+diseases+in+pakistan+pdf PDF link annotation
    • http://lnstagramverifiedbadge-media.com/how_to_use_lavender_flowers_in_cooking5inhr.pdfIn PDF document text
    • http://viewcreditscore.info/how_to_do_cover_page_for_research_paper_mla_formath1bbd.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/geeojfz/corporate_strategy_definition_history.pdfIn PDF document text
    • http://lassituda.online/99523996453c81x1.pdfIn PDF document text
    • http://legendnat.space/903346316641ihxt.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/5Dcgcjb/colors_of_the_rainbow_song_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/jeaFgdG/photo_studio_places_near_me.pdfIn PDF document text
    • http://raisinshub.pro/55476067872cpqgr.pdfIn PDF document text
    • http://alex-chekalev.com/99681681632kp8iz.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/Yjs5jh8/dirarugunomamopoki.pdfIn PDF document text
    • http://auto-agents.space/color_balls_fill_3d_bucket_fill_challengesmlbex.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/zamolazezata61qzt.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/iiidhfq/26623398133.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc60383-2509-448a-9cc8-cd46da59538e/telumigosal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6beca497-6ae9-4eea-a4a7-5d4fb5c22520/jaxudexabuluf.pdfIn PDF document text
    • https://66166ed5-207d-48ad-a5ac-83b7e977862f.filesusr.com/ugd/0d0d42_bda9b29298b641d29b69411ae59e9f12.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_2fa6ac22efe048cab78d0c420df15a28.pdf?index=trueIn PDF document text
    • https://d9c73feb-c945-4d97-9d44-ff62a4b57c47.filesusr.com/ugd/12056e_91d5b96336614d94a3b15cc2a277a3fe.pdf?index=trueIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_2d01a78d11da463cbb349eda18b34c5d.pdf?index=trueIn PDF document text
    • http://xorabaza.rf.gd/sopufas.pdfIn PDF document text
    • http://ripivetozevulu.epizy.com/wjec_sociology_a_level_revision_guide.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/liwewoxazojalematiziwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b90cf2-fe8e-46c7-9fc4-f3329914b8f0/britax_frontier_clicktight_installation.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_off000127c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C2 5220 bytes
SHA-256: cbb0a751224eb4268c81f70756f19865506d2d1ff806cb8621ade60dae909c0f
font_01_sfnt_off0001399e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399E 12032 bytes
SHA-256: 088d765c5ef0ab70ad7c0f70f46b58bd28635ced1fef35c39261ada77e4e1b98

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