Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3249580901fe0f1…

MALICIOUS

PDF

97.9 KB Created: 2021-03-19 04:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c38c553cfc6ef5fa7b78729ecf129a59 SHA-1: d072484b596bd78ba9f5fb26308249e9edcfc3b9 SHA-256: b3249580901fe0f1a43e91ef52b438d2c4dceed52ed722e78cab58597f10f084
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, with one pointing to a suspicious domain 'pelibifir.ru'. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it may be used to redirect users to phishing sites or download further malware. The document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/wix?keyword=how+to+get+into+bfa+alphabet
    • http://health-top.ru/paxonagaregijobuzusatvsuv.pdf
    • https://cdn-cms.f-static.net/uploads/4380691/normal_60517d1501b9e.pdf
    • http://supernefritroller.xyz/hitachi_compute_blade_500_serieslvcft.pdf
    • https://cdn-cms.f-static.net/uploads/4386366/normal_60507a5e404b2.pdf
    • http://boxberry-24.cc/nomuxodijowumopitikasibi86o9d.pdf
    • https://cdn-cms.f-static.net/uploads/4392861/normal_6011041f6ae10.pdf
    • http://tryporte.xyz/behind_the_pine_curtainrjq0m.pdf
    • http://songkfrk.site/hid_touchscreen_driverkw387.pdf
    • http://ig-copyrightnoticehelp.com/how_many_volumes_of_tokyo_ghoul_root_a_are_thererdp5x.pdf
    • http://moresukko.ru/93361975311tb0d7.pdf
    • http://7lessons.site/kegenkyil3.pdf
    • https://cdn-cms.f-static.net/uploads/4464852/normal_5fd9f2c6dc278.pdf
    • http://copalofa.site/homelite_240_chainsaw_manualeo4mh.pdf
    • http://vamoktin.ru/jack_reacher_2012_online_streamer8qy.pdf
    • https://cdn-cms.f-static.net/uploads/4406787/normal_60159510260f9.pdf
    • http://meetporte.xyz/do_you_need_a_degree_for_digital_marketing2uf0x.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b08a0670-bafd-445d-a32c-6e82c560a99f/79009130149.pdf
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_b5c5c037310d4755bcffd87479c73b21.pdf?index=true
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_41ee6b65c6b14ac3b7cdcad9cc85b363.pdf?index=true
    • https://uploads.strikinglycdn.com/files/513bda77-b05a-4185-aff7-9a001a714cf9/zone_of_proximal_development_higher_level.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f92.bin
4e2574e532d7ac49198ff972b088474634dba09dcb374ccafc69f6d679f0fdde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F92 4872 bytes
font_01_sfnt_off0001302f.bin
ff17b6a3ee4dadbd6a3a904c3bbefd49ccc6b3e2b6ef02b24f4e3c2ac4664c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1302F 11260 bytes
font_02_sfnt_off00015682.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15682 16204 bytes
font_03_sfnt_off00016baf.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16BAF 4324 bytes

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