Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f2482e7b6c3e7e…

MALICIOUS

PDF

84.7 KB Created: 2021-03-09 18:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f809a1966e839ecf934d98c7a9d1a054 SHA-1: 970b06b496c14122fbca24075d8e63ea34a2ed73 SHA-256: 79f2482e7b6c3e7ede3f6d8e51ec0cfdb862bb59ce54a86113cdb03adbbe0391
186 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. 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 0.9990

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
  • 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.
  • 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://bologen.ru/strik?utm_term=is+newsmax+on+tv+in+canada PDF link annotation
    • https://cdn.sqhk.co/fupokonabat/NjbtJCb/83120044070.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/igcAicY/89489594541.pdfIn PDF document text
    • http://jadogedixonow.iblogger.org/python_projects_for_beginners_reddit.pdfIn PDF document text
    • https://cdn.sqhk.co/pinebiven/dq9LLgh/acrylic_nails_set_press_on.pdfIn PDF document text
    • https://tukobigerokigab.weebly.com/uploads/1/3/4/6/134653943/gogumomegerapi.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/mSex9ij/60641383528.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/axhaU6c/8838671749.pdfIn PDF document text
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/4a83e7caef45.pdfIn PDF document text
    • http://dixajadabaw.66ghz.com/haunted_forest_movie_free.pdfIn PDF document text
    • https://falesejus.weebly.com/uploads/1/3/1/4/131483218/gisikixagorol.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/5706092.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/qNlrie9/lowigilokobuzizopukes.pdfIn PDF document text
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/4132169.pdfIn PDF document text
    • http://zemawage.22web.org/gofegumiganodatemow.pdfIn PDF document text
    • http://tiwelonepozafuw.iblogger.org/14456574453.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/yggFOD9/centurylink_outage_map_des_moines.pdfIn PDF document text
    • https://powipopes.weebly.com/uploads/1/3/1/4/131406611/xovisoviroxuxe-pajivisi.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/ihiehhN/67216485037.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/ZijQQb0/amazon_prime_video_subtitles_not_working.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/jomanoxolakik-tupidud-nutofu-wazomuv.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
    • http://wofiwapuret.rf.gd/meluzufowobizonuzarukiwi.pdfIn PDF document text
    • http://penabak.epizy.com/harbingers_mobile_game_guide.pdfIn PDF document text
    • http://runozozupegefo.epizy.com/good_housekeeping_christmas_gift_guide_2018.pdfIn PDF document text
    • http://nakunefizuvodu.epizy.com/3d_text_effect_illustrator.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_off0001007c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007C 4904 bytes
SHA-256: a7b5d147af3edfb9820ac48aa9ddc4133d2fcd532b59f68ffbf5c1bfc12bd0d9
font_01_sfnt_off00011120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 11172 bytes
SHA-256: 056242099ae213afd0ed8d9a2eff14e013609c0391291e63a135dfb886d52271
font_02_sfnt_off00013728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13728 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378