Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d48c3809ba65b33…

MALICIOUS

PDF

72.8 KB Created: 2021-06-03 03:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8a0b2220b522695282477e1e2e084486 SHA-1: 110f23459b0f5b144f585b1c34afc2c66f336ba6 SHA-256: 3d48c3809ba65b33d27d1d2e02a094ae1d2c39a235cd08eb8f001743838051f8
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a suspicious domain ('pixomot.ru') that is flagged as a potential redirector for malicious activity. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/pbw?utm_term=house+of+da+vinci+l%25C3%25B6sung+deutsch PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5fc7ee6132dac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_605f838631514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475875/normal_5ffff89bd506b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384480/normal_6026e5bdbe767.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_603e10d188531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5fed20c7a510d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zixereves.pbworks.com/f/butterfly_knife_template_csgo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be74284-6d40-417f-8030-aaff7978a967/the_lord_of_the_rings_the_hobbit_full_movie.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144419382/82311874710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d38835f-2250-46d6-aa55-d4bad8cc8e77/zilojafowebokujivus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4311889-96ad-4ce8-a2c4-c3caea7868de/kuremewazaretenutadorugax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4feb753d-2119-49b6-bd72-49a20f61d663/48492513117.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/w/file/fetch/144423456/88044860200.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144428679/59628281791.pdfIn PDF document text
    • http://polubisoxuwo.pbworks.com/w/file/fetch/144498204/butonusezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b53c9c5-d433-452e-bb57-85425af1d9e2/how_to_copy_vhs_to_dvd_toshiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b419fe-ff38-4649-a871-5d2f33f6f37f/ingenuity_rocker_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038906c9-29ce-41c9-aa04-9c5cc52ef71c/why_is_my_honeywell_thermostat_screen_blank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94644504-0ba6-4f8b-802c-ac0573146b02/27872267246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153acc68-15cc-44f6-8b3f-dce7224a5073/99517418452.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/sasefuxixopowumizovukara.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_off0000dc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8F 5348 bytes
SHA-256: 0afd7ccb528bd0efafcfd40562edfd5b2c4c45437941d46bccf4ac4d18c322d9
font_01_sfnt_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 11876 bytes
SHA-256: f0c9c81713b18e00950ba6f488677e2aa3206d4ad88b86582c05bbaa09d50544

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