Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2ddd221d3f2af6…

MALICIOUS

PDF

81.4 KB Created: 2020-12-21 04:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7294562992b920ba4115c9dbad03f0ab SHA-1: 9559b6f82586f212e3e1451aa441aeda9f508687 SHA-256: dd2ddd221d3f2af6cab78b28911ce503f6a899cb98e62e1383cfc991058b4c3d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9426

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://traffking.ru/aws?utm_term=bilinear+transformation+derivation PDF link annotation
    • https://lirabofopexile.weebly.com/uploads/1/3/4/3/134356775/selokajoda.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/rizefimono.pdfIn PDF document text
    • https://ralikinu.weebly.com/uploads/1/3/4/8/134883141/b633b4dec.pdfIn PDF document text
    • https://wejusapud.weebly.com/uploads/1/3/4/6/134614256/7866222.pdfIn PDF document text
    • https://fevijalefo.weebly.com/uploads/1/3/4/3/134383315/d6840546.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/wenobagupexekap/shimla_mirchi_movie_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2c3c5b7bc966055df3f1/t/5fddd811ef8e407a9e8240b1/1608374290221/tesazesaxisuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c67c9f-3242-4b88-b5dd-1370dc18461b/11334950690.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF0 3036 bytes
SHA-256: a48d22fddad769174f6cc2006f0bb329dd603d48a9a2adfad7e6325620a2dc0f
font_01_sfnt_off0000e6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B9 5164 bytes
SHA-256: ecb24997e45828eed188a6bff97ec7b94bc3ad21178865636f1509780d847ab1
font_02_sfnt_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 12512 bytes
SHA-256: d323ba677c7fcf8c0aa5f9513a008cbc2142a1914cd224dbf625d416cfde2849
font_03_sfnt_off00012274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12274 16280 bytes
SHA-256: b2a2af2c214ed68e198649bc52005f6989373d8a2053a887e51539c41845b813

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