Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad86e0df23378f00…

MALICIOUS

PDF

66.5 KB Created: 2020-11-12 23:39:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 98d65a31bf97065c92b7b781c76715b9 SHA-1: ba068c5f2e4801b85ebcc7523d17cedd2046af36 SHA-256: ad86e0df23378f00c678a51615933c1f868c6f32814446d9b4c892caaa3869bd
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' suggest the document's primary purpose is to direct users to harmful sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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/123?utm_term=the+dubrow+diet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f928f3c4e7b8.pdfIn PDF document text
    • https://xebivonejawaf.weebly.com/uploads/1/3/4/0/134096192/1776914.pdfIn PDF document text
    • https://zuzolavilasobin.weebly.com/uploads/1/3/4/5/134523903/1424403.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/sefipa/helpful_villagers_mod_164.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/18170498866.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/camping_jetty_park_campground_map.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/74668339852.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/mega_man_x3_dr_doppler_stage_1.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/gene_mapping_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/hotspot_shield_premium_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/double_replacement_reaction_lab_answer_key.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_off0000ca92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA92 4888 bytes
SHA-256: b4f69dacfa936e8034dd1168ffef62ed54e5de47ca8e7862d4217d05b27bf5af
font_01_sfnt_off0000db34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB34 10100 bytes
SHA-256: 00f46f20a4f5fc84199f744fa7070581ae61967b74267f31b2efeeba1c8ec1a9

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