Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23434f7814ffb24…

MALICIOUS

PDF

70.0 KB Created: 2020-11-11 15:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0dafd8f667e2a88839fd1de4f1aba9af SHA-1: 1f22467284ad5687c71beef5d7a2cb89cc733703 SHA-256: e23434f7814ffb24257796b17e822dfd62535c21c99a9b90a9ad3a667c79dea2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical finding for a PDF link farm containing numerous external URLs. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The presence of many external links suggests an attempt to redirect users to potentially malicious sites, aligning with phishing or malware distribution tactics.

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://trafficel.ru/123?utm_term=homer+jr+high+wrestling PDF link annotation
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/fba671a5f2ad15a.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/gikazasa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_5fa37b0503a25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_5fa70349e8934.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/kawiganatunovigefuf.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://uploads.strikinglycdn.com/files/eff9acc0-ce0d-4da9-be69-6c233a2974f6/90970710097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d921222-8f95-4da0-ac0d-a5cdbaf4f8ff/detoponedutofemirod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a69f25-22c2-4384-abe4-227d8e945e9c/91372325436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c421f3-6dc4-47a1-8d02-601da1b9f3eb/des_moines_register_all_state_football_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf067289-d04c-497d-b95f-28c2df886e03/minecraft_well_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef90d98-8c34-402e-b81e-84b7d44ee71f/22096459065.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_off0000c969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC969 4808 bytes
SHA-256: e6f45c1a63f7b61bcc340dc48a733707caab52a70b296b5ef870ea6ef66f9f2c
font_01_sfnt_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 10512 bytes
SHA-256: f5aabbc03ae0019177041ad3829f33beb5b462c644a39de230abba10bfc74dc3
font_02_sfnt_off0000fd97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD97 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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