Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87ed0a9c2e0d88c…

MALICIOUS

PDF

76.9 KB Created: 2021-03-19 23:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e595267f9fe2fcacf9b085bcf9c4e330 SHA-1: e084bda873d9aa269445d5aef82202e9c5088fff SHA-256: d87ed0a9c2e0d88cdb9969d50d08f198976540de91e946df6f021553e38f9089
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple disposable domains, with a primary URL being https://jumiwimov.ru/wix?keyword=mandatos+informales+negativos. While no scripts were explicitly extracted, the PDF structure and its nature as a link farm suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/wix?keyword=mandatos+informales+negativos PDF link annotation
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/d5704b8136f.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/cbb617668.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/gozoren.pdfIn PDF document text
    • https://funudenor.weebly.com/uploads/1/3/4/3/134319253/6169559.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/2EOhOhf/lonovesidupufo.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/inhhLqX/xidapigur.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/zudeboz.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/d7HjcfF/kavurolokosozil.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/Zn01Iha/temple_run_2_apk_mod_hack.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/kojotokavigagoxanipew.pdfIn PDF document text
    • http://dowotezovemalo.mygamesonline.org/bamupeparidaraxugutotone.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/3fgfgdE/bubble_pet_bubble_shooter_bird.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/dozeja.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/haHDz3G/cach_hack_game_vua_bong_da_2020.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/bededuxotulapil/bulosufukaxedoremuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/bpsc_pre_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/software_tester_jobs_chicago.pdfIn PDF document text
    • http://vufatemosoduv.epizy.com/adobe_reader_10_full_free.pdfIn PDF document text
    • http://solezod.myartsonline.com/nogipumikezuwedamase.pdfIn PDF document text
    • http://rumavajusugeg.rf.gd/achyutam_keshavam_song_in_female_voice.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/67174573079.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/how_did_the_world_change_after_world_war_2.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_off0000e823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE823 5292 bytes
SHA-256: 28aca8c3e08c5f64130d9647b9a6867a0d4d1cbdf19dabeb4a13759e6f9c1186
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 13272 bytes
SHA-256: caf3bbc194221ad0aa578c6d0c8240a2f75ca271c26c6f36330ee85f74657232

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