Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c01dd72c04643d2…

MALICIOUS

PDF

83.7 KB Created: 2021-01-04 00:55:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e607816618bff907dc4c5d4f66be5fa5 SHA-1: e9c671133a64aef2cd607251ec8f138e36f11a31 SHA-256: 7c01dd72c04643d2da6b47896051d9b723219683851469d283df7f88beb2b621
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier also indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://trafftec.ru/123?utm_term=adistar+racer+red PDF link annotation
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/xepipexip-bafanupow-kutibuku.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/aba33d808.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/fogatifekil_rajokotewepifo_ridujikuge_pemovagaj.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/BKo4ih5/wumodi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426550/normal_5fc479e7ddb87.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://s3.amazonaws.com/gurafoga/miley_cyrus_butterfly_fly_away_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37bf579-67c0-41ab-b6c1-2ebd0150ba14/4363975730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc39ec4b-238e-45cf-8a94-fff08bbe0a30/watafunimekawarapiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651fbd1b-10ab-4666-83a9-f8b06dbe8d1b/strong_versus_weak_acids_pogil_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a795814-8ca0-4bb6-b9bd-a8294fd50ac6/62902753201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8d3a61-7163-475a-89d3-6c30b690a9a6/super_mario_bros_3_gameboy_advance_rom_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/words_that_start_with_nib.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_off0000f400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF400 4460 bytes
SHA-256: e4b53978530db60e04767b72979cf80c35548f73dc7af98afebc188fdb5b6ac2
font_01_sfnt_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 16128 bytes
SHA-256: 89378ee9f4823959f4480f8936d087bdf97a27d9755c3407f894ec3b3b0c1fba
font_02_sfnt_off000131e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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