Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f14ba30f542b31e…

MALICIOUS

PDF

72.8 KB Created: 2021-02-14 12:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 944811e74f132ce16451e32ea0b22d9f SHA-1: bc6516f70e7e942c3e49600b0902d596e873b391 SHA-256: 2f14ba30f542b31edef39dd585c4ad72367ff520974dc8df54f4a2e61c1f3404
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards the common attack pattern of luring users to external malicious sites.

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://baarspo.ru/123?utm_term=parker+o+ring+e+handbook PDF link annotation
    • https://cdn.sqhk.co/wejawujagi/bHLu7g9/52098311918.pdfIn PDF document text
    • https://daxusumupazi.weebly.com/uploads/1/3/4/7/134702932/05ac9cdef6.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/Bgdjgja/american_express_chat_service.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/vizafowowexetu_jexupabipisoban.pdfIn PDF document text
    • http://harmony-market.ru/40765819400gxs24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481993/normal_6025b63553018.pdfIn PDF document text
    • http://xulenegutuwovi.iblogger.org/98509219202.pdfIn PDF document text
    • https://lepovomika.weebly.com/uploads/1/3/4/7/134701686/bevafugune.pdfIn PDF document text
    • http://tk-pobeda.site/the_lunchbox_torrent6fmzq.pdfIn PDF document text
    • http://filitopalanima.22web.org/bosch_exxcel_express_dishwasher_manual.pdfIn PDF document text
    • http://rukozhop-guide.com/14904594770425vv.pdfIn PDF document text
    • http://wabitolukarile.22web.org/alan_wake_american_nightmare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bazejufojowopor.epizy.com/jumbled_words_for_class_10_with_answers.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_off0000e14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14E 5080 bytes
SHA-256: 386f2d62b7fa0d202b5e48929450771d3fa6273c8957b524738bd5ef8ce912f5
font_01_sfnt_off0000f28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 10592 bytes
SHA-256: 498d702274faaddebfe480807c201a7b42c669b1d2c72213ac0259863af1372a

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