Malicious PDF — malware analysis report

Static analysis result for SHA-256 af4d76ff8b11bef1…

MALICIOUS

PDF

67.3 KB Created: 2020-12-19 02:15:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9a39ba905b568c562587f34b553707ee SHA-1: 9d3db7458c962582b3593d340ad8466d33bc8bf4 SHA-256: af4d76ff8b11bef1b2a2d70d5107402cef7093607cb176707425a35e551e8d63
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The primary URL, 'https://trafffe.ru/aws?utm_term=can+you++spotify+songs+without+premium', suggests a lure related to music streaming services, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/aws?utm_term=can+you++spotify+songs+without+premium PDF link annotation
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/2488268.pdfIn PDF document text
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/zadowu.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/juterunarifidoxojek.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/f6a6595abc470.pdfIn PDF document text
    • https://pefeluleno.weebly.com/uploads/1/3/4/6/134698673/povev_darenimowipir_pifinozij_lelemozefiku.pdfIn PDF document text
    • https://tizosofamininu.weebly.com/uploads/1/3/4/3/134352685/6f34561843c.pdfIn PDF document text
    • https://renokiva.weebly.com/uploads/1/3/4/3/134353994/mademivejimilix.pdfIn PDF document text
    • https://watinadapazibe.weebly.com/uploads/1/3/4/4/134492378/jaxadilogabo-ponadikobig-larewupigosopem.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/rusidigixosa-rekijos-somuno-xejegujugijom.pdfIn PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/salirovaxoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1dcae94-3e02-4a60-94b6-291315168f1f/33917877647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af18eedb-a4d8-4fac-a59b-21d7b7e71786/2103932568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0948a03-bcec-48f8-b61d-2f1e552b91fe/zupisureropepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da23a7b1-baba-4214-b4bc-b302467c4425/fallout_4_extreme_particles_overhaul.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/10048202718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a957d20a-d62d-41cf-9eeb-c3b431568975/rikojabonep.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_off0000c9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F6 5380 bytes
SHA-256: 8ba6eb18e9e595674646040b2411ad57647ba917c6e3972a953f57da9b221730
font_01_sfnt_off0000dc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3A 10660 bytes
SHA-256: 9e60cc4af456cf7806699171e69b353ed8b40ef8e92587dd2fe60e04158d8e39

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