Malicious PDF — malware analysis report

Static analysis result for SHA-256 0977c52014b44f2b…

MALICIOUS

PDF

75.2 KB Created: 2021-04-05 18:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2c08a5e3ad1d602ed00fcd44e732f16a SHA-1: 515b6ad2b0294ab476d1e5420d4f55ac2aa9337c SHA-256: 0977c52014b44f2b9b5e6a3c972369d221eb91638596eb3f353a0e6b6e9e2208
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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/123?utm_term=power+bi+project+management+dashboard+template PDF link annotation
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/ruwom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_6023faa556b6b.pdfIn PDF document text
    • http://vuzuwul.getenjoyment.net/read_the_red_queen_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427293/normal_600f2604abeff.pdfIn PDF document text
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/matalajijilipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491439/normal_601b59f2e0654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_c3a0296bb7954e069ede0a3c7f47c12a.pdf?index=trueIn PDF document text
    • https://4f640d82-8365-4c22-93d6-dbd3427c3fb0.filesusr.com/ugd/55e8b7_c93d4502448943fdbcae83db38c40672.pdf?index=trueIn PDF document text
    • https://467375c7-a7a6-4806-a9b7-892c2a528f89.filesusr.com/ugd/911174_b71ad50edd124b2698fc2907b5c80f9a.pdf?index=trueIn PDF document text
    • http://potopofekolapo.rf.gd/integral_ex_cos_x_2_dx.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_04430790246745518190a20d71865d60.pdf?index=trueIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_fe7179983da74434b7b32c52965d5ea6.pdf?index=trueIn PDF document text
    • http://kipazafar.atwebpages.com/wipetetofalozusegix.pdfIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_c325a23936d8452da7faf4fc5aa3c207.pdf?index=trueIn PDF document text
    • http://rafobubavotiba.epizy.com/lg_top_load_washing_machine_leaking_from_bottom_front.pdfIn PDF document text
    • http://muzobun.rf.gd/agarose_gel_electrophoresis_lab_report_introduction.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_off0000e722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE722 5796 bytes
SHA-256: fa21b20da4a20428b064eeaffdef9bb41817964a1cb8084c43fa6dfaf73514f7
font_01_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 10816 bytes
SHA-256: 2189ae19012fb4b71f67c419f21e1aedd3fce1dabfaee9df228036f7635c295f

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