Malicious PDF — malware analysis report

Static analysis result for SHA-256 17460f980f7e78db…

MALICIOUS

PDF

78.7 KB Created: 2021-02-25 14:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 09ace4404529f8f538af85a3aac5f0dd SHA-1: 9c5e9d7c18aca38a1d45c1a380e30fc454996f19 SHA-256: 17460f980f7e78db2b56244ef21a035c5c5839b2c0f8514bbd6db621dfca472e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://maypoin.ru/strik?utm_term=how+to+clean+hot+springs+filters PDF link annotation
    • https://cdn.sqhk.co/xezalagefog/cihwhdg/hexagon_terra_cotta_tile.pdfIn PDF document text
    • https://boziwukajolefix.weebly.com/uploads/1/3/2/7/132711983/4352212.pdfIn PDF document text
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/d363a8.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/dubefuposa.pdfIn PDF document text
    • http://osmosiotzs.fun/2018_can_am_defender_hd8_service_manual8l4yi.pdfIn PDF document text
    • https://xavexipaw.weebly.com/uploads/1/3/1/6/131636683/7f500f7e6e9f6.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/kuzovoxaged.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418013/normal_5fe42a2b0a2b5.pdfIn PDF document text
    • http://andyhongdigital.com/short_story_ideas_with_a_twist_examples5cdd0.pdfIn PDF document text
    • http://cetop.xyz/33750914064px4wf.pdfIn PDF document text
    • http://nerroba.info/fumin8f6vg.pdfIn PDF document text
    • http://shishkin-seed.xyz/how_to_clear_allison_transmission_codesc1pm5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/wifubiwirelexit.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/52801556397.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/spring_framework_guru_swagger.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/cotton_bed_sheets_designs_in_pakistan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 5120 bytes
SHA-256: ae95799a711d1456b80ac05923c6992a100e3396fc118c4107c237169cedc914
font_01_sfnt_off0000fb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3C 10700 bytes
SHA-256: 5af5053c551531c9b1097c7ddf2e6e5c2aa788c32d18c86ee58e0d40ff89c2c0
font_02_sfnt_off00011fc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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