Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be12afff86e1f41…

MALICIOUS

PDF

81.6 KB Created: 2021-01-02 06:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d70e7674395a7265de70822f4366ca89 SHA-1: ed59ee8a09da8f257b889314a89adc070fd0f111 SHA-256: 4be12afff86e1f41d1f7b834574880f15ad6b9ab960aa252ec54900ad817a06e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a high number of embedded external links, with a critical heuristic identifying it as a PDF link farm. One of the primary URLs, 'https://traffine.ru/123?utm_term=pathfinder+chained+and+unchained+barbarian', and another linked PDF, 'https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdf', are flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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://traffine.ru/123?utm_term=pathfinder+chained+and+unchained+barbarian PDF link annotation
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://zogowejodumuf.weebly.com/uploads/1/3/0/7/130775171/wuvasalelo.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/xesujopuxar_jexox_xumixawasa.pdfIn PDF document text
    • https://netulomite.weebly.com/uploads/1/3/2/8/132814473/3055836.pdfIn PDF document text
    • https://nuzolegan.weebly.com/uploads/1/3/4/5/134576582/mifekadoxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/87613939576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aadfe61f-4ea4-4c3d-864c-d113cc92018d/71578582628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ae7924-f3a6-4b29-889a-16c423982385/lobokutagimefamimovekar.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/farivuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0138b3a9-d967-4933-9804-27ef71f58cc0/badejejerim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7920e546-23a8-420a-999f-c3378a4bb9b4/61167752141.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/2013_vw_jetta_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/mutasojixivubuvobojam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37955349-c878-43ae-868a-a454814f682c/3746224165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a551fdc9-cf46-4600-9aaa-1630dc34115a/paul_fussell_class.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 5040 bytes
SHA-256: fa9aefa7d478e74e4f9dd9af9088a3474971cf38361ed8259e9551bdc7f93795
font_01_sfnt_off000114bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BC 10816 bytes
SHA-256: 90093c63e227c404c1925a6a3bce7b1a3865b678e8b7eac4b05f5c41ab99fd02

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