Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9084daa0d575b1…

MALICIOUS

PDF

82.5 KB Created: 2020-11-14 12:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7193a17f5236ca63594ba0fe0f0e0434 SHA-1: e901db07403b54d51fca7222167b586079c55bcf SHA-256: 1f9084daa0d575b195e7c6096201de21a9f9f1a773d1e681c5307665099b45f5
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a technique commonly used for SEO link farming and potentially distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded URLs, such as 'https://trafftec.ru/123?utm_term=taco+bell+nutrition+chart+pdf', are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://trafftec.ru/123?utm_term=taco+bell+nutrition+chart+pdf PDF link annotation
    • https://junaxukag.weebly.com/uploads/1/3/4/4/134493834/3296965.pdfIn PDF document text
    • https://gumiworawogulaf.weebly.com/uploads/1/3/4/3/134356348/kejaguwudiv_panega.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/vadomev.pdfIn PDF document text
    • https://tinalolovini.weebly.com/uploads/1/3/4/3/134371967/finuf.pdfIn PDF document text
    • https://rozazokosu.weebly.com/uploads/1/3/0/8/130813972/9437527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_5f9a7ab33fe9e.pdfIn PDF document text
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/narapor_fidogi_lemalo_mozesu.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/62713f94-a1a1-492a-b533-4f3db22b0e7e/vesuxugafud.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/formal_definition_of_bewilderment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e6cd63-f156-4f21-adf7-963781d44bbf/my_talking_avatar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/397669c4-ba58-42ee-9b74-6e7b9e7e6b72/rufalixijokupoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de605108-ecb8-4b99-853b-9d557ec7c1ac/vozakuf.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011137.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11137 25004 bytes
SHA-256: ffd584a9ce00c6d1384516a240ac3cfae5c70e8642b0405fecb93c3b4b60754d
font_00_sfnt_off0000d967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD967 5152 bytes
SHA-256: 936c6556034db2d51c335d802b02d09d1b1769c93e9dc48cf3fd3cf51838dd23
font_01_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 11284 bytes
SHA-256: 57462a673f0048f7dcc6b4e844b96f3642bb26122b175f5ba2d0550332dd04c7

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