Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f3ea18c70b3071…

MALICIOUS

PDF

60.6 KB Created: 2020-12-19 01:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9b07c82d2a9b3e3fbcc455623706437b SHA-1: 66e505e5a2143dff14a89ca6033a545fc4d45861 SHA-256: e9f3ea18c70b3071ddf1e82d3eec3567b9e853167ffb19f9639649386155cdf5
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This URL is likely used to host phishing content or distribute further malware. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=bhp+billiton+annual+report+2006 In PDF document text
    • https://busuguzokiw.weebly.com/uploads/1/3/1/4/131406797/d227a3.pdfIn PDF document text
    • https://jodotabamusunew.weebly.com/uploads/1/3/4/4/134402052/972746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_5f977eef1ba48.pdfIn PDF document text
    • https://xeganixirutor.weebly.com/uploads/1/3/4/5/134508666/9050361.pdfIn PDF document text
    • https://nirulutot.weebly.com/uploads/1/3/4/7/134700174/robowivexuguro_sasogozalag.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/5fc287b9085bf90c0e078428/t/5fc5941018e72e5fdb972d08/1606784018971/62051044465.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc31e2f88c99b6d37b5b932/t/5fc5f966645712565409c541/1606809960568/bohemian_rhapsody_watch_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/4959008361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b7cbb20-e4af-4104-a6ed-37b96e812e65/14877726135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f94364b7-4ac5-47cb-8c2d-b740c7a37814/5370196491.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcaa7c5e71df64d6bdd8f6/t/5fdd0e3d0377c830fcb76982/1608322621760/fugebibaviz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe19d23c6ccf69f326e69a/1606293970920/taco_bell_canada_nutrition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d84308-68f6-47e1-b0d8-cf8545808c68/90567575103.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_off0000b20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20A 5344 bytes
SHA-256: d552cfc1b7e128aff17dc42f927af116fb72df33771d33862e8b36e3bb62d984
font_01_sfnt_off0000c429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC429 9836 bytes
SHA-256: cff7ae984ea86310c9e89a4489c43457b3d1347d06a1bfcbe01d9a543ef7be77

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