Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2a2b63b0d67d3e…

MALICIOUS

PDF

77.9 KB Created: 2021-03-10 05:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6ecce2a2e2d648b9750109446c195ad0 SHA-1: 53c584888c1b9999556d09639523965825448064 SHA-256: ca2a2b63b0d67d3e66f155d563edf8de7bc23c008087ec09d2cfea9301570c17
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-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://leonvi.ru/aws?utm_term=hp+4500+reset+ink+level PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5ff9ff2196afe.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/bank_exam_books_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/eyjaicR/gixejekisodekozazurafax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488815/normal_60149399db721.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/cigEjfT/arcangelo_corelli_sheet_music.pdfIn PDF document text
    • http://gazupoz.sportsontheweb.net/friedman_buffer_bay_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473375/normal_5fda2568e502a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386822/normal_5fd7fac839033.pdfIn PDF document text
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/c39f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378831/normal_5fc6134619090.pdfIn PDF document text
    • http://vafakewa.iblogger.org/55528964351.pdfIn PDF document text
    • https://xojobade.weebly.com/uploads/1/3/4/3/134385351/9736941.pdfIn PDF document text
    • http://wugobolemisezam.22web.org/96764883570.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://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_b05529fe5b8e44a9b44b715e4cb41de7.pdf?index=trueIn PDF document text
    • http://misamoxatupepos.rf.gd/27857984122.pdfIn PDF document text
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_850cb60cdd2544d38ce13795873a5d4e.pdf?index=trueIn PDF document text
    • http://xarozimazog.rf.gd/delelesolifotadiz.pdfIn PDF document text
    • http://jujobope.atwebpages.com/negotiable_instrument_act_section_138_to_147.pdfIn PDF document text
    • https://ad323f3e-245e-4e3c-8b16-de91fefec063.filesusr.com/ugd/5ea691_e49178732abf4228bc72a7682a23b8f8.pdf?index=trueIn 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_off0000e8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E8 4720 bytes
SHA-256: 7c402d6834ef355ebe53b971de6aed0b18699aa4b02285680ad06d60ca28e6da
font_01_sfnt_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 10240 bytes
SHA-256: 43a57ebd24185a751c414b48f8486ea5cf414641c0023ac0e52146f64309c6e5
font_02_sfnt_off00011c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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