Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa798815eaa30c9…

MALICIOUS

PDF

76.9 KB Created: 2021-03-27 13:53:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b5d4374f5da179b7f0943df732cccdd7 SHA-1: 836c591866d8ccca6fc87b60b893d4c0fdda3a34 SHA-256: bfa798815eaa30c9a9b6207cb748180a0ac58acab65e08f30680b04e5ad3ea93
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains keywords related to downloading PDF books, suggesting a lure for phishing or malware distribution. The presence of numerous external URIs, including one pointing to 'fokemale.ru', further supports the phishing pretext. No scripts were extracted, but the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=english+speaking+course+in+urdu+pdf+books+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505096/normal_5fe845e90726e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_604a2d0485e5a.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/batesatudape.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/ccna_discovery_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_600e53ff0540b.pdfIn PDF document text
    • https://cdn.sqhk.co/giboxikewev/ihsWeib/g_stomper_studio_apk_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/betarudigi/cCtL3gj/fugamebopoxomolumaboba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_6009b1b7aa1e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_6028407b526b1.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/jhjhfCP/zadidedarufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedadezutovokiz.epizy.com/13048014803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6d25a2a-99fc-4a7a-9bb1-3fa6a41139f9/maze_runner_2021_cast.pdfIn PDF document text
    • http://bigamutalunu.atwebpages.com/jonomonapoponu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a82cb96-1d76-468c-bfbc-e044c5a0fe91/local_area_network_lan_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/72183873398.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/how_much_do_nurses_get_paid_in_chicago.pdfIn PDF document text
    • http://zexolaxew.epizy.com/android_vs_iphone_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/94714468927.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/27910108192.pdfIn PDF document text
    • http://xisapedugifado.epizy.com/amiodarone_davis.pdfIn PDF document text
    • http://duxuramubot.epizy.com/bobbi_brown_cosmetic_line.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_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 5668 bytes
SHA-256: c5b07f920e399795ffb20b850a50bd76ca90d6dff23f39125c7f631998a91e4c
font_01_sfnt_off00010093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10093 11168 bytes
SHA-256: 98d220ec62bd8042ce8d96783834b5a58368545e828542a7abb0923eafd8cf87

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