Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae4888ac7d56bac…

MALICIOUS

PDF

75.7 KB Created: 2021-04-05 05:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f704d73aa192455e786547d01fcdcbfb SHA-1: 35e9bf3ad09cb3b9f59fb102fbed668e734b35a9 SHA-256: fae4888ac7d56bac2068d11e9a1549a0b108ce9c97c7ac954aa5700aed55f8b2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, including a link farm designed to direct users to various websites. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware delivery. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/wix?keyword=difference+between+element+compound+and+mixture+examples
    • https://cdn.sqhk.co/duwenaxiseve/ziihgJ2/69849568876.pdf
    • http://findattime.com/eheim_auto_feeder_setupm8zp5.pdf
    • http://lasns.fun/44045846436dy14d.pdf
    • https://cdn.sqhk.co/nidaruzada/jcfifKy/toy_airplane_flight_simulator_2020.pdf
    • https://cdn.sqhk.co/nulusezitelo/Ihalpii/arcade1up_pinball_dimensions.pdf
    • http://wtia.space/bakokelawonazukipigcw6mt.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_3071abb5bf7445f4bd94284a9976e3d9.pdf?index=true
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_bc960f4ac8664c00bc9dafeddff063ba.pdf?index=true
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_91f4876e4f094a52ae6e0b8b7939c7c9.pdf?index=true
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_ef283dfda4ea4a4582bb681d5aae8d82.pdf?index=true
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_350bc6976dad48748b1fc84c91f40da0.pdf?index=true
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_99c6f8468d9348fcbae95b9d775d600b.pdf?index=true
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_dc6c8a24723645528aede9151965d62c.pdf?index=true
    • http://vufigenetusanu.epizy.com/87152213628.pdf
    • https://uploads.strikinglycdn.com/files/d06b5236-a37b-49e4-9f62-e533a7908825/gofodugedapuzowetobixepa.pdf
    • http://liwaferizezu.epizy.com/what_generation_is_kindle_d01100.pdf
    • http://mematalo.rf.gd/geforce_970_specs.pdf
    • http://balanuvanatitan.epizy.com/hp_840_release_date.pdf
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_4ed9bb046f7045258b0372455589b751.pdf?index=true
    • https://uploads.strikinglycdn.com/files/36117070-5e27-4a62-a4ea-c842fba13445/1100_words_answers.pdf
    • http://sujotoginejo.rf.gd/calabozos_y_dragones_3._5.pdf
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_c754f3e145fd4b54a8f9f848cf7efca1.pdf?index=true
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_f809d58113b743079d1bcfc5180a14e4.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_off0000e8a0.bin
64d06989ef621885f53def9c63feeabbbb1f491e1669228a324a0e69a081787e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A0 5600 bytes
font_01_sfnt_off0000fbae.bin
0038fccc046f771a295bef78d2f68e8dfb81372902a9e6f22015d88c3d27120f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 10828 bytes

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