Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5152515c70de53…

MALICIOUS

PDF

73.8 KB Created: 2021-02-16 01:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0dd3c9c1925677a6b61cfd72d024db99 SHA-1: 0eb5f00dc89b3b740391a1f045fa9df9db7e9b44 SHA-256: 7a5152515c70de53d72dc7d85b401c2cdf594599a9e67262b7b92fc95291566e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users through deceptive links, aligning with phishing and malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=warm+bodies+soundtrack+vinyl PDF link annotation
    • http://options.expert/seattle_news_reportersdcrld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fd8f64ccb76b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_6015d5b55bdce.pdfIn PDF document text
    • http://daniele.store/72282918918q57t9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_5fe9a8eab8229.pdfIn PDF document text
    • http://therarbooks.com/avakin_life_generator_no_survey8bt2l.pdfIn PDF document text
    • https://cdn.sqhk.co/livixugakuf/Bhcuodc/kuvilewugonegilokefepax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470832/normal_5ffd4842c8533.pdfIn PDF document text
    • http://cmb-societe.com/chopping_board_colour_chartlmre0.pdfIn PDF document text
    • http://scarcebook.com/vamobutokemuvofozexephdwbx.pdfIn PDF document text
    • http://zootime.store/48468927711ebkp0.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/HjeMiec/rabavatowikunisuxijerezan.pdfIn PDF document text
    • http://zazonowipudu.66ghz.com/geloxewufumenuzar.pdfIn PDF document text
    • http://fortuneo.best/vemofixabelinogiqcnuk.pdfIn PDF document text
    • https://cdn.sqhk.co/vopovaroxamo/jgHgjhg/52436688433.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
    • http://solepaf.epizy.com/zowobuximalefigegitatiwu.pdfIn PDF document text
    • http://guxodolabisiruj.epizy.com/xapalanuf.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_off0000cff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF4 5348 bytes
SHA-256: 233dfbb2c810489b3f911b7a5f76ff3adf1121782aca5a17b36265d6e9df9de5
font_01_sfnt_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 12420 bytes
SHA-256: a2e40d0dcefd4263163bceda30fdefa60be3eff303492e60cc42a46b942c8b35
font_02_sfnt_off00010aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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