Malicious PDF — malware analysis report

Static analysis result for SHA-256 5189ad55fd01e1e6…

MALICIOUS

PDF

95.8 KB Created: 2021-04-11 14:07:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 02da4eed74ed555dd9b7de6a062d6113 SHA-1: 529759981f350245a63bce1c5e90a0211d91a2f3 SHA-256: 5189ad55fd01e1e624991eb270345c968368029080d742be857c34d26b17b3ca
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jottigo.ru/strik?utm_term=google+sketchup+free+download+for+windows+7+64+bit+with+crack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490752/normal_605d7cf9cbd94.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/nujewelopojepojix.pdfIn PDF document text
    • http://shoop-fe.ru/leketobabozimelii0tcd.pdfIn PDF document text
    • http://maritimog.medianewsonline.com/85170379002.pdfIn PDF document text
    • http://naturalik.fun/623316139895dmxf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6021cc3cd0fe0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485005/normal_5feb7ef097f89.pdfIn PDF document text
    • https://vifekifuveju.weebly.com/uploads/1/3/4/5/134597055/silijuvusipu.pdfIn PDF document text
    • https://gosabotef.weebly.com/uploads/1/3/4/3/134332229/5e7f35590564aea.pdfIn PDF document text
    • https://winojarenegesut.weebly.com/uploads/1/3/4/4/134481716/lijideseluregi_libamu.pdfIn PDF document text
    • http://xanejog.medianewsonline.com/nuwoxekake.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fcd87111477b.pdfIn PDF document text
    • http://instapodarok.site/zomenusimoriwepad8whve.pdfIn PDF document text
    • https://jujizifij.weebly.com/uploads/1/3/4/3/134309807/rafubu-pepasuzox-rogegaken.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5fe0e60381e09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3dfeb98d-96c3-41e9-92c3-ed80cf92b164/why_is_captivity_bad_for_animals.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/ps_vita_pch_2001_vs_2000.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/naxujitukisefugujifu.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/67880741965.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/ordained_minister_wedding_ceremony_script.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/ipod_touch_4th_generation_8gb_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e256a2b9-8918-4371-835b-e7c7f63d5904/tim_ferriss_podcast_sponsors.pdfIn PDF document text
    • http://gitodake.myartsonline.com/pojowesom.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/vusesuluzibunones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab39f87c-6342-430b-b1eb-95ed0b716c10/sinners_in_the_hands_of_an_angry_god_analysis_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4255572-a469-4687-999c-1e3218cc1bfc/xugevotenatomew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19ed5af-183e-433a-8196-1c619559d1d2/tuben.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001128b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128B 5948 bytes
SHA-256: 6969e13cb1d7aed92c8d43667bac6d99df99abee185f3e9593f1f48e1f994f4e
font_01_sfnt_off000126ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EC 11324 bytes
SHA-256: 32b7a567911e533e2077973c1b106490aea5ecab3345398734fb92fbcb50cbd8
font_02_sfnt_off00014c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9B 16376 bytes
SHA-256: 069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c
font_03_sfnt_off00016242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16242 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2