Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc31a726407ab29c…

MALICIOUS

PDF

80.8 KB Created: 2021-04-06 06:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ec2d53f3ffc6e00f2cd972da0bbd2523 SHA-1: d011867eb0d922fb8e5f86ae2d144d0105339615 SHA-256: bc31a726407ab29cc94121f3f82b956c5eee5d6e795b2aba574a87fcb7fe84c1
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains a high number of embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The primary URL, 'https://lozipotod.ru/123?utm_term=tamil+spiritual+books+pdf+free', suggests a deceptive attempt to trick users into downloading further malicious content under the guise of free spiritual books. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=tamil+spiritual+books+pdf+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366348/normal_5ffdc99b951be.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/icBhe4P/raxawamupotex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480382/normal_6038534c1fc0a.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/fovaxurebutufukuwora.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/ggfifpV/zombie_hunter_zombie_killer_mod.pdfIn PDF document text
    • http://vexidizagopukib.22web.org/45001553277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_6025929827d49.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/hbp4esQ/lynx_lake_fishing_regulations.pdfIn PDF document text
    • http://gagefiwirimat.medianewsonline.com/57078348416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450039/normal_6061d8ba4c0bd.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_95722af2779b46678d1cd45466927887.pdf?index=trueIn PDF document text
    • http://demuremapinob.epizy.com/juzobidowigezizelet.pdfIn PDF document text
    • https://298c7861-702e-4dad-8e6b-798164301c36.filesusr.com/ugd/98adb1_d7566542e14f40b9a70a0c3fb4c4f7a8.pdf?index=trueIn PDF document text
    • http://bolilolu.epizy.com/76432715713.pdfIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_f170782d49694f30bb23abd236d88586.pdf?index=trueIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_71ed310fee8b4b2bbc3162e24df5c30b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nonabafat/scientific_method_data_analysis_worksheet.pdfIn PDF document text
    • https://60659a61-a27b-47ea-8eac-a81775c62269.filesusr.com/ugd/7a7fb1_592c321dcec048c09ee8f0d16b270559.pdf?index=trueIn PDF document text
    • http://kimawawasero.onlinewebshop.net/fojevin.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/long_division_math_worksheets_grade_4.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
stream_003_off0000edd5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEDD5 15320 bytes
SHA-256: 04290b8a2024e4af12b855d9ef5632e910186ee17b0cf86610e960bfc676de8e
font_00_sfnt_off0000dbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCE 5340 bytes
SHA-256: fb20461f5b0dcfe5950434646922880972e87a9ceebca89971aaec745e86948e
font_02_sfnt_off00011155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 10760 bytes
SHA-256: 53c78fcce4937e98b5c62add198636e727cfc2c586d00f4bc179102bd6ef81c6

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