Malicious PDF — malware analysis report

Static analysis result for SHA-256 04893806f0edf129…

MALICIOUS

PDF

82.3 KB Created: 2021-03-20 23:38:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b7ed9cba6a7647aa25563c7aa36f5bd SHA-1: bd760a3c557180e749acfc5eb2f9e68874b9cad7 SHA-256: 04893806f0edf129ca1692155719b702c2eaf4ad8a41dd1b7eb2a3095abc3b92
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded external links, with the primary one being `https://dafemum.ru/wix?keyword=when+will+i+get+pregnant+horoscope+2018`. The heuristic `PDF_SEO_LINK_FARM` suggests the document's purpose is to generate traffic to numerous linked PDFs, likely as part of a link farm or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=when+will+i+get+pregnant+horoscope+2018
    • https://ziwedalonom.weebly.com/uploads/1/3/5/3/135325023/4571268.pdf
    • http://niwitejot.iblogger.org/fawavopatolaw.pdf
    • https://sesanejaw.weebly.com/uploads/1/3/1/4/131407178/5572c00aa69d.pdf
    • https://madigapelodawip.weebly.com/uploads/1/3/4/8/134846312/5292501.pdf
    • http://jonuzukuforab.iblogger.org/kojebojijopuxowenososo.pdf
    • https://moxamegok.weebly.com/uploads/1/3/3/9/133999551/6643426.pdf
    • https://jadetikoj.weebly.com/uploads/1/3/5/3/135350844/7633808.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kobizesamow.rf.gd/nuditowenupogugiza.pdf
    • https://s3.amazonaws.com/wutezigojuxi/xeminuxebowusedorodiran.pdf
    • https://uploads.strikinglycdn.com/files/8f958330-e7d8-4976-8675-40215f7835c0/how_do_i_reset_my_honda_service_code.pdf
    • https://s3.amazonaws.com/pidufozu/auditor_general_bc_reports.pdf
    • https://uploads.strikinglycdn.com/files/1eacf759-43ce-461e-aa49-a23bfbe42bbf/what_is_non_normative_ethics.pdf
    • https://18d8f76e-0bdd-4b96-b744-fee987eed1b0.filesusr.com/ugd/1486c8_a32aab16a2754827ad94fb313fefef4a.pdf?index=true
    • http://pafemovokixap.rf.gd/disap.pdf
    • http://toxuwer.epizy.com/97390402792.pdf
    • https://uploads.strikinglycdn.com/files/671edcb4-c235-4d63-a88b-d836297fdaa6/dipez.pdf
    • https://uploads.strikinglycdn.com/files/252b3730-9c62-4450-857a-1ba9fb1c4522/fenutegukutuxituvodufedok.pdf
    • https://s3.amazonaws.com/salosibejodod/34858362948.pdf
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_90ebd522df5848f7b57968ea6741e15d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f6a0174c-c1d0-4ede-a2ab-1dafbc14be8b/a_vce_windows_10_crack.pdf
    • https://uploads.strikinglycdn.com/files/bf21b18b-8c9c-4954-8713-54ace7b39f0a/3223645583.pdf
    • https://uploads.strikinglycdn.com/files/fd65e3a9-604d-43ee-92c4-db9ed3af1b5b/english_skills_with_readings_9th_edition_free.pdf
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_0231889f9e7848e5a08a79b9524b49e9.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103d6.bin
eccd85ec3313d79664e08f95ea05edb4edaac228cc5ea0c4a816965de85777fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 5820 bytes
font_01_sfnt_off000117c3.bin
4ea7ad5f0e0d39dcf3ae713732e9098566d8a1f8e9248e683180bd97a7da6322		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117C3 9992 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.