Malicious PDF — malware analysis report

Static analysis result for SHA-256 662d47195f363e10…

MALICIOUS

PDF

74.2 KB Created: 2021-01-23 23:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: aada4cc11f4c25738f34f52402bd84f3 SHA-1: 1d8ef428c53a20ccb0123168d0854751554aabdb SHA-256: 662d47195f363e10346aa73f7a42de2a77791888ca2ed576a259e95e0f58496a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, identified as a link farm, with one prominent URL being traffitec.ru. The presence of a link farm suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

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://trafftec.ru/123?utm_term=black+max+lawn+mower+with+honda+engine PDF link annotation
    • https://site-1221861.mozfiles.com/files/1221861/nuxutos.pdfIn PDF document text
    • https://site-1248593.mozfiles.com/files/1248593/rokikimufiv.pdfIn PDF document text
    • https://site-1175316.mozfiles.com/files/1175316/45675171990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488574/normal_600770a25defb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5ffa30c764c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486190/normal_5fd80e7c3551b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fe395826b08f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_5fdef25f610c5.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/2414994.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/mesixadelomomo/cfop_algs.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/bombay_film_all_song.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/android_pay_canada_rbc.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/faa_aircraft_registration_change_of_address_form.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_off0000d6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CA 5236 bytes
SHA-256: 077ee4208039181a6cdb25a8d2c7806bfdc645515f05b9cad2a34e747c0227d4
font_01_sfnt_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 11028 bytes
SHA-256: f66d3f48f732c92461c70000462da43b57e6cbb996b67e31f7aa4e7ab3b8cd24
font_02_sfnt_off00010df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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