Malicious PDF — malware analysis report

Static analysis result for SHA-256 13d2c8ad616a08c6…

MALICIOUS

PDF

74.0 KB Created: 2020-12-19 04:51:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b45851a76325183ef61bcc3a08b5f7c0 SHA-1: 9f2b5bb0095ec2be80336471c053b626f363b1d2 SHA-256: 13d2c8ad616a08c6a279d2d0bfcebdd8d8322fcdeb3cb05cdd469342986a28b4
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 numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary URLs points to 'traffine.ru', suggesting a potential phishing or malicious content lure. 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/strik?utm_term=who%2527s+the+baddest+sho+nuff+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486522/normal_5fae8a28b764d.pdfIn PDF document text
    • https://vumopiwerelo.weebly.com/uploads/1/3/4/7/134730258/24f4df0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5fa820b569a72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5fad819d69469.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/zepifudoxapo/87806870.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5108d5e8e827d42a8a9a7/t/5fcb5d9e36758319a551af60/1607163304471/dutigefipabumogojem.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc394bee2fce462bc9ccb38/t/5fc9f4046a94db17e494d579/1607070725489/75384104781.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/similarity_and_difference_between_translation_and_transcription.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/eggo_mini_pancakes_cooking_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/43835727960.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/vegebunu.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/zageduperebebufomeragafu.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/affected_the_manor_apk_obb.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_off0000d769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD769 5016 bytes
SHA-256: 06596a041afb1338a1755f8b66b25100858fd2e789e3ce504f4d4fcc039f31bb
font_01_sfnt_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 10716 bytes
SHA-256: b949ead6eb3e1e44ae276436bebf69622222eaf836d6d09a5e30741e3bc99485
font_02_sfnt_off00010cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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