Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb896641775e2e66…

MALICIOUS

PDF

63.0 KB Created: 2020-12-19 17:15:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ba9f822a750a7103ca7e5ff5b4afe196 SHA-1: 73775af19286c0f52ae6567cbfe035332f0606c4 SHA-256: fb896641775e2e66f4d89e00c53c67d229a4be765cb3eeab546de19741222376
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites. The primary malicious URL identified is https://trafficel.ru/123?utm_term=ariens+log+splitter+dealers, which is likely part of a link farm or phishing scheme. ClamAV also detected the file as Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0, indicating a phishing or trojanized nature.

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/123?utm_term=ariens+log+splitter+dealers PDF link annotation
    • https://sumulejuno.weebly.com/uploads/1/3/4/3/134361372/rexukamugevuxed.pdfIn PDF document text
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/e745b0dc240a0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc013b624b06a7eb3fa8a9b/t/5fc1e6e37acac6192a05bdf4/1606543076591/59682831922.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/48720309458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7eb95e-e82a-426e-b1ad-8346a479ed48/poe_ancestral_warchief_vs_protector.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b7cf7b-61e8-480c-9532-e1d637d4116b/steph_curry_charity_classic.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52335cd1e280355efa049/t/5fcde505662d5e24e0c5326c/1607329029645/70155343941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae1d6d4-852e-41b6-9d85-2853534b265b/judezuwemobasekefodapiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37be466c-ed5e-4778-8fe3-d3e9eb64b115/wifi_psiphon_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d561a0-567f-47fa-9c90-204e797b6c0e/demenara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37dd37be-83c8-4ece-b851-674085328225/3386642398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b36ec7e-f729-4a6b-ab4f-bb7d5e9d74c2/tuvarigamidunenup.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/9195952287.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_off0000bb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB0C 5116 bytes
SHA-256: f5b002735493636eb96162ff34d0503cb106ab25b2fe59eb02a83ec4a1bbbafe
font_01_sfnt_off0000cc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7E 10060 bytes
SHA-256: 8ddfab1d62d94313a5fa0b19afc1e9c0ff4e86271e923eb00a4e895da820aa9f

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