Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec9fbead870bf1f…

MALICIOUS

PDF

69.5 KB Created: 2021-01-05 01:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 03c303eedeff383b2a459afbc8e2006d SHA-1: 3224bd732bdedc78de4cd0cef3465befe32c9df9 SHA-256: 7ec9fbead870bf1ff727d0b69d3b0ba6d62922fbee43d97c5645d0a01bd6d457
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to external sites, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the nature of the heuristics strongly suggest the document is designed to redirect users to malicious content.

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 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=cathar+star+wars+planet PDF link annotation
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/mirajafutori_xerasefezivuf_bawojag_sijaguki.pdfIn PDF document text
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/vinupifol.pdfIn PDF document text
    • https://mexepefavofuj.weebly.com/uploads/1/3/4/6/134659137/tibamumega-vegatapilixun-sogojezalupu-lizixibuxovul.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/ebb59aaecd1.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/b4835ef33f915bd.pdfIn PDF document text
    • https://jesipawuba.weebly.com/uploads/1/3/0/8/130874316/23a034795.pdfIn PDF document text
    • https://bivejeweki.weebly.com/uploads/1/3/4/3/134322338/bixizubojo.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/midizaxopazeji/78050561831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a12361af-648c-4289-83d6-4082f4d330aa/laxemim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cdc3090-59c6-4eac-8839-43b17510b9d7/another_word_for_tough_love.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb937e3b-88bb-4d21-87e7-52f5177dcfa4/90859968399.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/blizzard_slow_2019.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_off0000d437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD437 4904 bytes
SHA-256: e4b456ee571887bff122d2b5c358ed84540ba2963331d68e6c1a742fabda176a
font_01_sfnt_off0000e4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EC 10620 bytes
SHA-256: 8742249e121de4a704de40a1849de4ad21a2bbdd11639cb798c1d5c3de9b6d22

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