Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf8110b694646ae…

MALICIOUS

PDF

82.9 KB Created: 2021-03-24 12:07:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7ef583259afbd72157209198e399cc37 SHA-1: 4ca3dabafe3fb8d17045fe774a21756355f71180 SHA-256: 0cf8110b694646aec68bd1393d16fdc49171a634be9ca002a2ca56e235d0dd22
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that point to disposable hosting and form a link farm, indicating a likely attempt to redirect users to malicious sites. The presence of external URIs and the nature of the PDF structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/wix?keyword=multiple+entry+points+docker PDF link annotation
    • http://zarabatyivat.ru/how_to_bake_in_turbo_oventv687.pdfIn PDF document text
    • http://mojofaza.mypressonline.com/85404248388.pdfIn PDF document text
    • http://plusstore.pro/mojopotebikapujihp1er.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/Er8hcoj/xevadufesejubabigef.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/ib9gcia/muxiwe.pdfIn PDF document text
    • https://xivamiwilazux.weebly.com/uploads/1/3/4/7/134742933/gikafiwuve.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/26852949897.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/sofemeladefi_garebevoxiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456377/normal_5fd63c39aee53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453720/normal_604adaa3f1e78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_6044d6d5078e2.pdfIn PDF document text
    • https://bebejumupetokox.weebly.com/uploads/1/3/4/5/134513190/soxexezirux_zumozitun_ruwuxejunumod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5fd650b8a7f24.pdfIn PDF document text
    • http://linza.media/mudevipanabewepobugotabi1z20b.pdfIn PDF document text
    • https://zumokijux.weebly.com/uploads/1/3/5/9/135966910/beb924fd.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/9TpAjcn/soccer_star_dies_in_car_crash.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487419/normal_5fc5bf46904c7.pdfIn PDF document text
    • https://wamabiror.weebly.com/uploads/1/3/1/1/131163705/dibetixefujabujafu.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/fekazudabo/animoji_app_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/23174579094.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/convert_to_autocad_drawing_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/pulse_polio_programme_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF661 3368 bytes
SHA-256: ac2b493eefdf779c8a4fa10c6196ebc7bb4d9cbea0da8d22363f12a9d3eb8774
font_01_sfnt_off0001027d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 5028 bytes
SHA-256: 196dc23a5bb3b481612d538f861b0976099bd9c957deaae76d519d0cc68a0b59
font_02_sfnt_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 11892 bytes
SHA-256: 3e6601c69a60943808ad59ba0775dd29382df430c6a313b86b251da06aaa834e

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