Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b2f1c8437eb589…

MALICIOUS

PDF

71.5 KB Created: 2020-12-11 01:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: eca34dc72d39fa8bdf183f4e03def745 SHA-1: b7f18ab85418f0d33e8c8a78f1dcf8fb510c5449 SHA-256: 78b2f1c8437eb58974e40d45cf73ffe81429aaf2ab074322b648f14f800fc508
126 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating it's a link farm on disposable hosting, directing to a URL that appears to be part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://trafficel.ru/strik?utm_term=citadel+class+cruiser+deck+plan PDF link annotation
    • https://lavuzolitad.weebly.com/uploads/1/3/4/3/134327879/987887.pdfIn PDF document text
    • https://sulomotosepotu.weebly.com/uploads/1/3/4/7/134744650/8212079.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/331112.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/bunuxokevixuduzusag.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/badumidof.pdfIn PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/1999593.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://static1.squarespace.com/static/5fc547c8c6229360ecc9c624/t/5fce6bfc5d2e6f3bda732d25/1607363584173/xolin.pdfIn PDF document text
    • https://s3.amazonaws.com/wisatutadi/examples_of_metacognition_in_math.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/73506969520.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc599753398ff75154dc615/t/5fcf94271a78ee5f016ccf74/1607439400313/43297038388.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59addc6229360ecccea80/t/5fc6a017145a8629dc9ad718/1606852631115/mitoxafajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4223f7fd-40a0-444b-a7cc-2facb3461f55/reading_rainbow_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/atlas_netter_editia_5_romana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f8101ab-46b3-4120-8f90-1ff1319da0bc/fabric_stretch_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef1a00f7af3919d21549/1606217498854/man_machine_chart_xls.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc77d8c8c9e503d27aa062e/t/5fd001deec2ae40ed7379967/1607467487825/nascar_racing_games_online_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/sovadiredu.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
font_00_sfnt_off0000cce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE3 4928 bytes
SHA-256: cb8f91261e0de5304559346ad2586e8a7c5b8294623733a53a66b2a1c340fd16
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 11288 bytes
SHA-256: b54bd023f564be1f0ea4f7125d46acf48a14883c5ede6615770dc1c9b79f15e3
font_02_sfnt_off0001030f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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