Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1bf653d031e12b…

MALICIOUS

PDF

75.7 KB Created: 2021-04-24 21:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 07236ffa035066a9f0228ccf39f9a38a SHA-1: 2aecb1070ca0789d25fd46053cd6705224c9838a SHA-256: ed1bf653d031e12be2db5795f165f2e8cba68e735a2755687dd7792c5b822bfc
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://fokemale.ru/strik?utm_term=different+types+of+pimps, which likely serves as a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=different+types+of+pimps PDF link annotation
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/wofabofu.pdfIn PDF document text
    • https://mesofuxemivoge.weebly.com/uploads/1/3/1/3/131398024/7353783.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/bawskee_1_zip.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/5a9454.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/420c1faa-48fb-492a-ae45-a396000a4f36/63080367808.pdfIn PDF document text
    • http://xomedejufe.rf.gd/61560156607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb55655-9078-4160-8a9e-ed683cb9bdec/toyota_hybrid_camry_reviews_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/walden_life_in_the_woods_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab772aea-8726-4bd3-8939-99e9b341ccbf/linksys_ac1200_router_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41d5f2c-8bea-4fa3-8068-ea51a7c8d62d/22713768138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714f6e2f-f256-40e9-93d9-91c9d2d0eb7c/65253753130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e53748-0a9e-42d1-a587-fc3e07991f31/sugijunekokonov.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/auto_chess_android_tier_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d06002b-13ca-4962-8ce9-da71f01c0f59/monikifeginujor.pdfIn PDF document text
    • http://nonosolagosev.epizy.com/2012_lexus_ls_460_for_sale_by_owner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c590d172-953b-4e5b-9a64-d168a71ed0bb/70182595731.pdfIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_8c4263b77cd146218ab094b97d43c703.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc7d4d7-0639-4c6b-a581-e751e2aa0497/tonubojaf.pdfIn PDF document text
    • http://fivexuto.rf.gd/how_long_do_compressed_earth_blocks_last.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_a576f04e8ffc4115a9176e92f3bf3722.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e89af33-184a-48fa-9037-77e725a10388/the_dynamic_laws_of_prosperity_free_download.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_off0000eb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 4908 bytes
SHA-256: 2574596bc70e357a802a8faa77d11fdcd8439df8dcc92c60f9e2e6d0cb5e9382
font_01_sfnt_off0000fbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 10764 bytes
SHA-256: 995af0ad95bc28bdeb3f7c3477069fa99fb699ad254e18fbcab36ef44d4e025e