Malicious PDF — malware analysis report

Static analysis result for SHA-256 542747654057f01f…

MALICIOUS

PDF

70.0 KB Created: 2020-11-11 06:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1bed81489d94a11ca25fd5d3b87b3818 SHA-1: 9170af631ada293c361406312551f3b660646aca SHA-256: 542747654057f01fe8dc3cc6341ee578e7a631f82f9fd5a457ff1285c26da741
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafficel.ru/strik?keyword=unblocked+games+money+movers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5fa262dd34209.pdfIn PDF document text
    • https://wenilitedosi.weebly.com/uploads/1/3/4/3/134315728/833251.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/nitatotol/46881866040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fecac0e-3b98-4fa2-8b91-87cd4107372c/on_ameridan_s_trail_puzzle.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/apps_where_you_can_earn_free_gift_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbae3173-b897-4656-9769-a427aa1d1d1e/wofoniwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e51ce3d-eec8-4a3c-ac6a-6f61901a9463/63113978803.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/calendario_escolar_2018_y_2019_sep_195_dias.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/statistical_learning_using_r.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f120b8c2-c2bb-4c45-a4be-8aa7cb366420/benefosevikojivarogila.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/xarifemibevimanevu.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/84556088042.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_off0000d2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BE 5616 bytes
SHA-256: aef61982ececa1ec730b9842c84d48d79e1b5f246ce65b798415070a613ca6e7
font_01_sfnt_off0000e5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CE 10444 bytes
SHA-256: 87a49b8a71616b18261f048eceb1136c772804ccd417181d91ce4d19d6c3151d