Malicious PDF — malware analysis report

Static analysis result for SHA-256 317a9804cdd38c60…

MALICIOUS

PDF

83.7 KB Created: 2021-04-30 18:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e423d2e77d65761dfdae08dcdb749507 SHA-1: ae26214ee91939bddfdd4f22e873da4f78284088 SHA-256: 317a9804cdd38c600e14df3bfb67aed6f02b077f5a486fc0af0dcf66ea51ab32
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. The document contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The primary URL, 'https://gimoguvi.ru/strik?utm_term=char-broil+gas+grill+replacement+grates', is presented as a search result, likely to deceive users into clicking and downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/strik?utm_term=char-broil+gas+grill+replacement+grates
    • http://subfamjtii.site/rutakitqr7rp.pdf
    • https://cdn.sqhk.co/sazalevimit/7ghhejc/58050513156.pdf
    • https://cdn.sqhk.co/gotakavapu/qZtKifQ/pomakatefinevuberereze.pdf
    • https://lolizafopig.weebly.com/uploads/1/3/1/4/131453679/ligowum.pdf
    • https://fuzefiwojagolo.weebly.com/uploads/1/3/5/3/135308179/5971403.pdf
    • http://carbags.site/end_of_the_world_song_skeeter_davisnrqgr.pdf
    • http://freshnatur.fun/laxitujugaqjh9x.pdf
    • https://cdn.sqhk.co/tasaxasup/gsgYggL/lannister_armor_replica.pdf
    • http://copyright-rules-help.com/59996830424dvh30.pdf
    • http://organic100.fun/despacito_piano_sheet_free1lse3.pdf
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/puzebimoji.pdf
    • https://mirenixumevi.weebly.com/uploads/1/3/5/3/135309561/b7576fa9db6614c.pdf
    • https://cdn.sqhk.co/vubenexew/dihggcQ/deutsche_telekom_ag_annual_report_2017.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tikolikenugim.epizy.com/75976640672.pdf
    • https://s3.amazonaws.com/xalasawu/hollywood_reporter_survivor.pdf
    • https://s3.amazonaws.com/fupanabivote/libro_el_jardin_secreto_en_espaol.pdf
    • https://s3.amazonaws.com/jakujakula/bajaj_allianz_health_insurance_policy.pdf
    • https://s3.amazonaws.com/tuxutedi/29978418977.pdf
    • http://metukobitoro.rf.gd/nabipeg.pdf
    • http://vulomalizekuvu.rf.gd/22229347535.pdf
    • http://zonatenitisa.rf.gd/dobeduzusoxegibafix.pdf
    • https://s3.amazonaws.com/tuxexi/bluetooth_printer_android_phone.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c1c.bin
8103e4f2601f95253250a25c19762f195d80d6513f13e3d3783a6bf080c4a6ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1C 5424 bytes
font_01_sfnt_off00011e65.bin
704499cd60fe1da80e09a9b3b29660fbe1494e81c0c011dc29b53c05a3691860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E65 10228 bytes

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