Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a2c02a367cddfd…

MALICIOUS

PDF

72.4 KB Created: 2021-02-22 06:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4e5f5cc0a9b0210234469948176cedf0 SHA-1: 685c576cb398e13196050acb983fbd4efb6f0de8 SHA-256: e5a2c02a367cddfd76111551f851d6da4f83bfb1521e409d071d80ff2461c353
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and the overall structure point towards a phishing lure disguised as a game download.

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://baarspo.ru/wix?keyword=bloon+tower+defense+4+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403418/normal_60299c176b1d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fd63d7e00ad9.pdfIn PDF document text
    • http://instapriz.website/cgaxis_models_vol_11_freeabcku.pdfIn PDF document text
    • https://semanipiji.weebly.com/uploads/1/3/5/3/135312460/milalugafudi-nopusepina-piboj.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/voger-xalazigazet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fdeec6511014.pdfIn PDF document text
    • https://rosolivemimej.weebly.com/uploads/1/3/1/3/131382018/sazevid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445555/normal_5fde5b059a5c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_6032cc2c873b0.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/nPiiphh/nike_jumpsuit_mens_black.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444648/normal_5fcc6c285a66f.pdfIn PDF document text
    • https://ligibokone.weebly.com/uploads/1/3/1/8/131858045/c7876ebeb4d457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_6023d97054b72.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/dNRXigu/47016140435.pdfIn PDF document text
    • http://natfreshik.fun/rezerakimijupafijipay2lkm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403816/normal_5ffebed7adbc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370286/normal_6000da942ff57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jumerajoge.epizy.com/connect_four_board_template.pdfIn PDF document text
    • http://tefozofikiduja.epizy.com/38450796369.pdfIn PDF document text
    • http://gemiwojo.epizy.com/10_day_green_smoothie_cleanse_book_online.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_off0000e01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01A 5328 bytes
SHA-256: 7935c87976c58530329e899bf3dfa2ebe4bcfc435454c7e19399d4b8017ed8f2
font_01_sfnt_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 10016 bytes
SHA-256: 990f405ffddd636b6d92381fe03442c854631157f19c37222dc87080cf1c7fd8

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