Malicious PDF — malware analysis report

Static analysis result for SHA-256 117786dca1dc2446…

MALICIOUS

PDF

64.4 KB Created: 2020-12-18 11:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: b19bdfef9a7053bce1ef2568d326087e SHA-1: 393ab860c0d400a20abaf504714d8d6818118ebb SHA-256: 117786dca1dc2446ee22eaaac7e30b192732d0c6160152adaf261f26ad16fee8
156 Risk Score

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 link farm. One of the primary external links points to 'trafftec.ru', which is flagged as unknown reputation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO spam. No scripts were extracted, but the PDF structure itself is used to host and distribute links.

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://trafftec.ru/aws?utm_term=manifest+imdb+parents+guide PDF link annotation
    • https://zapirugitoz.weebly.com/uploads/1/3/4/5/134508168/tunawapo-zikod.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/daselex/13224806318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55436cde-162c-45b1-a3d8-bf59b98fbad6/81963396746.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58a1012facd59cecc81e0/t/5fd65102034a586a4f4150fc/1607880964337/82421642653.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14c376609fd0ee7940dbf/t/5fc83f1e43b29e7a5aee1c99/1606958878941/nopopefinawed.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/acronis_true_image_home_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/hp_brightness_driver_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/stock_ageing_report_in_sap_b1.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/43147553948.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/68194198294.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf483190b057dd37d5b49/t/5fd70dede5ac5828963946cf/1607929326747/41869785767.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/buderus_logamatic_4211.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/78233382748.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF23 5472 bytes
SHA-256: a4a4087935ef672dc4424536d29edbbe3c0e0a8814eabff8cdc969f8013b2ed7
font_01_sfnt_off0000d1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B2 10412 bytes
SHA-256: 987b4078cb2f1081d868019ff55459e068246e0c59bb393299daaca8397228b0

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