Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf457368a10935c1…

MALICIOUS

PDF

67.6 KB Created: 2021-03-21 08:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1cfcfce4aefab305736b07cedcb5790d SHA-1: 63b552b137e388e8f68714d78077349d48ed0788 SHA-256: bf457368a10935c1e52768e6faeb58a4711b34e993719b1625cfaa28db8f4860
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8128

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 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
  • 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://druttle.ru/strik?utm_term=mt+san+antonio+college+payroll PDF link annotation
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/fuzozibejipoxa_mabosozewo_newovulofib.pdfIn PDF document text
    • http://khareedforosh.com/are_they_really_twins_in_harry_potterdbjsl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463526/normal_5fef8a4827a4f.pdfIn PDF document text
    • https://zurirepazigotot.weebly.com/uploads/1/3/0/9/130969164/fugulosiku_kiwowimumiba_xufepemup_dafuwomil.pdfIn PDF document text
    • https://topalezomezo.weebly.com/uploads/1/3/4/3/134305389/namavon.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/vigonagawipes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_603397cd5c054.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/81396484838.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/age_to_read_trials_of_apollo.pdfIn PDF document text
    • https://xaredeni.weebly.com/uploads/1/3/1/8/131871979/nesofojozu.pdfIn PDF document text
    • http://ejqy.com/teramusedumipe7no9p.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/0e39468a-ccbe-42ba-916a-165c50688edc/simekeraluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d50e87f6-b341-44ad-906a-b8a5b1a40cdc/ukulele_basic_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bc47012-b3ba-4ec7-be42-45c7265f4315/national_safety_council_defensive_driving_course_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9738dd23-3090-4060-bde6-88feeb3fb637/ion_ttusb_turntable_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6fded62-527d-4385-b4a9-c06a3f120ab9/74541456346.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/70844382512.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1211759-1fc1-4464-b007-290a4d6db73a/purple_cow_menu_kingsport.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_off0000fecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECC 5208 bytes
SHA-256: accf6068843daf15978d9200e0c3e90f9047a1b2009837c98741835bc98ee9dc

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