Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b1c5c0a6a95b39…

MALICIOUS

PDF

70.7 KB Created: 2021-03-11 04:53:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: bf3b2a06afee49bdcdff351f94b924cd SHA-1: ff152af4df9d0560e21b99167320fce7cb62c4a5 SHA-256: 52b1c5c0a6a95b3983fcbcf571ee27b79aebca0eabed451147614f63a102fa64
124 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to potentially malicious domains, masquerading as legitimate search results. Heuristics indicate it functions as a link farm on disposable hosting, aiming to direct users to harmful content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7004

Heuristics 4

  • 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
  • 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://bologen.ru/award?keyword=chronicles+of+darkness+character+sheet+pdf PDF link annotation
    • http://juxeribitu.iblogger.org/61675338909.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_5fedbfe392cc8.pdfIn PDF document text
    • http://fofafowazu.66ghz.com/maharshi_telugu_video_songs_hd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415055/normal_5ffe522d6bb5e.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzitomizaj/2fyhiie/hokey_meaning_merriam_webster.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_6031f7438ed86.pdfIn PDF document text
    • https://cdn.sqhk.co/garonuvinug/gcJ8gh7/school_of_dragons_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/gfnQg9D/kuweg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_602c6ac4aa2eb.pdfIn PDF document text
    • http://nefotibabi.iblogger.org/28257716013.pdfIn PDF document text
    • https://cdn.sqhk.co/sepetuvab/iYxliiO/fibolub.pdfIn PDF document text
    • http://xipelosowux.22web.org/725149239.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/7eb28fe3-4ed4-4e5e-80ce-1a39c1faefb5/baldurs_gate_2_enhanced_edition_quest_order.pdfIn PDF document text
    • http://gemosufijubimup.epizy.com/acknowledgement_form_renovation_hdb.pdfIn PDF document text
    • http://vemaxuvigufu.epizy.com/xalavozukato.pdfIn PDF document text
    • http://punexowimuseva.epizy.com/son_of_bigfoot_movie_480p.pdfIn PDF document text
    • http://reditab.epizy.com/angry_prash_video.pdfIn PDF document text
    • http://loxosufodu.epizy.com/22506494426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d6d0cd3-a024-4487-ac19-8d939e73529a/ley_aduanera_2016.pdfIn PDF document text
    • http://wuwepapose.epizy.com/90904315973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4305b236-160b-4599-a90d-8f1d4cbf642e/how_to_describe_the_sun_in_writing.pdfIn PDF document text
    • http://sejineje.epizy.com/gastric_bypass_post_op_diet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001669ab-c573-4a52-817d-b258c99520ac/juvenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba65acd-46c7-43d1-bfe3-a1ea82b4333c/tavepixomogobomusanalis.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB29 5212 bytes
SHA-256: 1a95c32a51179a0f6be949545c900a295acd4aaf42f94b1f018813c5541a3544

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