Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e11742401c3196e…

MALICIOUS

PDF

77.8 KB Created: 2021-03-09 20:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7205db3d2510cfa9077bd7ee25478954 SHA-1: ee1867005b576bd37952c5edd7f84efc029dd294 SHA-256: 4e11742401c3196eed099e3322b881b05cddb65af6f894afada83e995648e5fa
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to disposable domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/aws?utm_term=how+to+install+windows+10+steps+pdf
    • https://cdn.sqhk.co/nivavepe/kGib6hb/e_sports_football_live_scores.pdf
    • http://reduslimitalia-oficial.site/best_no_crop_app_for_instagram_freefixw4.pdf
    • https://cdn-cms.f-static.net/uploads/4421341/normal_6019d72bdd78d.pdf
    • http://sosuziba.mypressonline.com/how_to_fix_lg_gas_stove_knobs.pdf
    • http://particulier-societegenerale.xyz/xebetazedinonod33po.pdf
    • http://kevarusakoko.mypressonline.com/2017_scag_tiger_cat_2_review.pdf
    • http://jekefidaz.mygamesonline.org/pefalalatifomapizuzefubus.pdf
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/zosovekor.pdf
    • http://leyloften.online/buxutosizqdlk.pdf
    • https://cdn.sqhk.co/zogowefu/jjyihjc/67865540595.pdf
    • https://pimupaxepa.weebly.com/uploads/1/3/1/8/131857198/tuzetipeloman.pdf
    • https://zulunapakaf.weebly.com/uploads/1/3/1/0/131070820/dewezapenusimaz.pdf
    • http://badgesverified.com/fnma_cash_out_refi_guidelinesccwxd.pdf
    • http://pugorot.mygamesonline.org/veliburalafu.pdf
    • http://wdd13.ru/what_biome_do_komodo_dragons_live_inqw9ab.pdf
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5fc75ad7b9a44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dagasopones/marathi_song_ala_baburao.pdf
    • https://s3.amazonaws.com/donake/pujigewewogir.pdf
    • https://s3.amazonaws.com/divelikubapiwaj/interrail_europe_travel_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ce.bin
a37bbf93644b0963ab14b12a615bbc65c9b56a004c523d3beb5c1d1e7e4e6a50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CE 4972 bytes
font_01_sfnt_off0000f9d2.bin
5705ebd6e6ad5e10e10bf68447b3aa4f3cb83187324ecdafe1d7d8878deaa729		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D2 9968 bytes
font_02_sfnt_off00011c05.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C05 4324 bytes

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