Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c9c13a7bffeb1e7…

MALICIOUS

PDF

74.5 KB Created: 2020-11-24 13:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b67bf32d72a714c261d7b7fc22766211 SHA-1: 9a55644ec8da5a392c4a6ae452589187c70073a5 SHA-256: 8c9c13a7bffeb1e7e0b0873836df0ab4db9e2e44e6c20ba1bff1f3015796ecc7
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 phishing or trojan threat. It contains a large number of external links, many of which point to S3 buckets, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The document body, though heavily obfuscated, appears to be related to search engine optimization and astrology, likely serving as a lure.

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/123?utm_term=6th+house+astrology+aries PDF link annotation
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/kifurilaxajap_vazuzoforir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_5fbcf2369f56d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_5fa1af5739737.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/jazamerijekufol/steam_workshop_er_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/63850422778.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/bokumelavesimemixuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/safut.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/felikubojavobutadaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d94ef6e-fb8e-4fb4-9932-b5f0085d9995/57401685819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71121b62-676a-4e8d-933c-9515a86eaabe/fanetepinejimoxotasi.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_off0000ead2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD2 5108 bytes
SHA-256: a8ae796dc7a82890d5f7d3fe77b52cd927e16b8955c380706f1487f3c1a757bf
font_01_sfnt_off0000fc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 9844 bytes
SHA-256: 06e5b1a84894702f144278f6119bd0a8ed90d5b589c0d53dce299e8eba7f687a