Malicious PDF — malware analysis report

Static analysis result for SHA-256 363bee8eb8fe1257…

MALICIOUS

PDF

93.4 KB Created: 2021-06-07 20:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 10e5208335d4f57613b44812720856f3 SHA-1: 908da995578479aa12a46d78ba1d999ffc269bfc SHA-256: 363bee8eb8fe12577a8e763e0919875761df5908052557ad4ba31b23c91dece3
126 Risk Score

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-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://medvor.ru/pbw?utm_term=pokemon+cawps+guide PDF link annotation
    • https://nosuzodudoj.weebly.com/uploads/1/3/4/5/134588086/8792298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403687/normal_601a1cc6e8a7a.pdfIn PDF document text
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/samoduvefere-webawinixojoda-zatuzazimawi-jisonukepa.pdfIn PDF document text
    • https://lutividagij.weebly.com/uploads/1/3/4/8/134896544/xuwevewijosu.pdfIn PDF document text
    • https://dasajusowerav.weebly.com/uploads/1/3/1/6/131637273/3987984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_605692c709c4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494138/normal_6050f4f31be76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pitavumiza.pbworks.com/w/file/fetch/144636282/how_to_pair_speaker_to_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c59373be-4595-4370-9ccc-d7bbb093e372/mexejabubanabixu.pdfIn PDF document text
    • http://fokurid.pbworks.com/w/file/fetch/144675753/workplace_safety_plan_sample.pdfIn PDF document text
    • http://zezimin.pbworks.com/f/street_dance_of_china_season_2_winner_mentor.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/xobodewuvusivur.pdfIn PDF document text
    • http://fudejob.pbworks.com/f/can_could_may_might_shall_should_must_exercises.pdfIn PDF document text
    • http://zemenifinabe.pbworks.com/f/22429604706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645d27cd-2910-4f41-afba-eedf409260a3/kuwuge.pdfIn PDF document text
    • http://fisukafetif.pbworks.com/w/file/fetch/144642981/fahrenheit_to_celsius_conversion_factor_formula.pdfIn PDF document text
    • http://kufugaref.pbworks.com/w/file/fetch/144595536/mabeje.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_off00012d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D55 5420 bytes
SHA-256: 480b640a3e802e5bd97b20f95b463e29eb0ad9dcc57c9845e20ae78cc7b08338
font_01_sfnt_off00013fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD2 12028 bytes
SHA-256: 815175a06ce6c9bbe0e137266f8a798f1b6c3f85d0a4a05c56b09411fd45325e