Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d39d69b8526992…

MALICIOUS

PDF

69.4 KB Created: 2021-02-14 03:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8c4a59ed4a8565de4a6671347cf6f9cf SHA-1: 3812bbaeab3c25db836a3a27dd83d35d7c99f38f SHA-256: 49d39d69b852699225d741b1462f836069e4f93757e7c09de3bfd5cd45344254
184 Risk Score

Malware Insights

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

This PDF document is classified as malicious, containing numerous links to potentially malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to Android app issues, likely intended to drive traffic to these external sites. The presence of multiple disposable hosting domains and redirector links indicates a phishing or malware distribution attempt.

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
  • 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://yafferge.ru/wb?keyword=android%20reddit%20app%20not%20working In PDF document text
    • https://patijunig.weebly.com/uploads/1/3/0/9/130969449/99fd2e718.pdfIn PDF document text
    • http://fsbsiod.com/nisatelizifopuidg9q.pdfIn PDF document text
    • https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/vogusila.pdfIn PDF document text
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/labanavuporetire.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/4512882.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/tugekopa-mapofovoxux-bagufiko-pajigifow.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/cbdfc2.pdfIn PDF document text
    • https://zodixezujiz.weebly.com/uploads/1/3/5/3/135345824/4764220.pdfIn PDF document text
    • http://umkatrade.ru/pilokeferuliselilovkz1qd.pdfIn PDF document text
    • https://sowozulame.weebly.com/uploads/1/3/4/7/134733070/xezumalanibumij.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/mejigavukolu/sport_icons_free.pdfIn PDF document text
    • http://mikugux.rf.gd/92729967803.pdfIn PDF document text
    • http://gimapetabotoza.rf.gd/administrative_law_pakistan.pdfIn PDF document text
    • http://xenemusexo.epizy.com/barricade_transformers_the_last_knight_toy.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_off0000d19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19A 5060 bytes
SHA-256: 536293afe2cf149234c92d6d6ae68e7a83a1973bb8d8508cad41fa6f97ccc692
font_01_sfnt_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 10960 bytes
SHA-256: 5f75afb56ff9ee56c625df6dbd01227a810004803dd6f3821ab8d6594fdf1087

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