Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6655528b0aa3120…

MALICIOUS

PDF

73.1 KB Created: 2021-03-10 06:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e95833379204223c1b90b907958b936b SHA-1: 9c98f5876f65704794367371a2fa0ae296bbd3e3 SHA-256: a6655528b0aa31203611dbae6a955010d684bf8bfbf84fc94fbdcaa97d7aa968
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of external URIs and the link farm heuristic point towards the document's primary function being to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/award?keyword=catia+v5+training+manual+pdf PDF link annotation
    • http://quinzsy-studio.design/aramco_operational_calendar_2020_downloadmlvda.pdfIn PDF document text
    • https://ritukananikunid.weebly.com/uploads/1/3/0/9/130969552/120f7b1.pdfIn PDF document text
    • http://50offshop.pro/42088797727ks0v8.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/into_the_abyss_anime_crunchyroll.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/4OBXbhh/notoviros.pdfIn PDF document text
    • http://mattelipsticks.site/lexus_es300h_price_in_pakistanlv2gl.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/jaO6hd2/36476276084.pdfIn PDF document text
    • http://iuts.space/bobuwildbxin.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/what_is_the_moral_lesson_of_the_adventures_of_tom_sawyer.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/36670621892.pdfIn PDF document text
    • https://gosabotef.weebly.com/uploads/1/3/4/3/134332229/natoritobov.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/jiheDjj/wojeketaresalel.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/what_is_the_main_difference_between_an_llc_and_a_corporation.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/el_guardian_entre_el_centeno_capitulo_21.pdfIn PDF document text
    • http://ergors.space/electric_guitar_amplifier_cableku147.pdfIn PDF document text
    • https://cdn.sqhk.co/wofetewa/eROhjmU/55345540219.pdfIn PDF document text
    • http://pasetbs.xyz/how_to_add_flowchart_in_word_2010w82ty.pdfIn PDF document text
    • https://rigopijifotifat.weebly.com/uploads/1/3/2/6/132695828/botatewabariza.pdfIn PDF document text
    • http://sadogiropi.mypressonline.com/tecumseh_mower_engine_surging.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://geforagegi.atwebpages.com/conservation_of_energy_problems_worksheet.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/podokepokunanub.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/16069281211.pdfIn PDF document text
    • http://jokosen.atwebpages.com/aguda_llana_esdrjula_sobreesdrjula.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 5272 bytes
SHA-256: a0948884dce356b0a989de5af4cafe0dbbb852f300375771a84b86c6ce104ec3
font_01_sfnt_off0000f489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF489 10164 bytes
SHA-256: f18e6729ab33e18790f91ea90369acbe96e74bcd32d555ae0d9b81213f7b491f

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