Malicious PDF — malware analysis report

Static analysis result for SHA-256 b972e9a545de2436…

MALICIOUS

PDF

115.0 KB Created: 2021-03-24 00:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3a9de7ba647b590e61ca7ed0e654285d SHA-1: ba2743ddbe18651e4790a48e2b58125d37144f80 SHA-256: b972e9a545de2436f649b58c4343536a90b4877e76e8347b61638ab2ea2cd74f
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://lozipotod.ru/wix?keyword=free+amazon+gift+card+codes+list+2020+uk', are likely used to redirect users to scam or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/wix?keyword=free+amazon+gift+card+codes+list+2020+uk PDF link annotation
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/2069432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_6010cf4af3097.pdfIn PDF document text
    • https://zumuwezejulo.weebly.com/uploads/1/3/1/4/131455722/fowobosavaw_zujonuvibume_vugepugasunoda.pdfIn PDF document text
    • http://posebakuxosafod.getenjoyment.net/angiotensin_system.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/28809970004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_6023ec0f36beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5fd65881178a9.pdfIn PDF document text
    • https://gibinefofagal.weebly.com/uploads/1/3/4/6/134668975/577008.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/2aa4db7.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/mezogagipubejutezojo.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://uploads.strikinglycdn.com/files/a46d690b-e17b-4070-93b6-11cce5758369/is_there_going_to_be_another_percy_jackson_series.pdfIn PDF document text
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_522035e2034d41fa8fef82374fbde2f9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c4c852-d103-43fc-a727-1ee9b2f05c4d/singer_touch_and_sew_756_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8c48d9-3f46-4086-bb24-568b95d59840/kuruwomawekovev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0d44485-9d2f-4206-9331-16b86bb07d07/how_to_treat_a_cyst_pimple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef4bb104-0633-44e9-a338-22dd7f4eca30/proof_of_first_fundamental_theorem_of_integral_calculus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986ec02c-58ca-4ea3-8e53-c2e3dc1865e1/4546608852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9490b164-7ca7-445e-8fdd-51097ea33048/gotepigowuredofox.pdfIn PDF document text
    • https://ad646471-8556-449a-8150-55a6f6ff724f.filesusr.com/ugd/7a1c5b_42c2fc737b854a3cb1a68e536cc736ad.pdf?index=trueIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_2322295d372e450991562a1526085df6.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_af3cf727240847feaad7f1e83152d5e0.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_off00017431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17431 5568 bytes
SHA-256: 68f11dfb563280d73d055acafe39e39df6fff82bb8086efe34fbb3e444773685
font_01_sfnt_off00018712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18712 11496 bytes
SHA-256: 7d18c391aa6bcc246bb32926cd80001765bd2e4af4e9c17167838aad1d5b5399
font_02_sfnt_off0001adcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADCD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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