Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1adfd5e4060278…

MALICIOUS

PDF

87.9 KB Created: 2021-04-28 21:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5a14ef6eb1f86e95cce23eced4884a05 SHA-1: 289215efa8021ef519dccb32aa3dfedef3982aa3 SHA-256: 9b1adfd5e40602788239e74f9fddf7e836c72f556ba16a36812d208f993a2653
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL being `https://gimoguvi.ru/strik?utm_term=how+to+upgrade+bowflex+pr1000`. This suggests a phishing or malware distribution attempt disguised as helpful content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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 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://gimoguvi.ru/strik?utm_term=how+to+upgrade+bowflex+pr1000 PDF link annotation
    • https://gekibevuzoz.weebly.com/uploads/1/3/4/5/134503907/9c14abe466885.pdfIn PDF document text
    • https://mibelilav.weebly.com/uploads/1/3/4/7/134747519/edf8947.pdfIn PDF document text
    • https://ropedali.weebly.com/uploads/1/3/0/9/130969406/9899521.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/cvsNQnu/lebara_top_up_number_dk.pdfIn PDF document text
    • https://lumosezuto.weebly.com/uploads/1/3/4/4/134499790/3de25e05.pdfIn PDF document text
    • https://funoridarudaru.weebly.com/uploads/1/3/5/3/135304061/nadejewazitirajetu.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/10486622999nx41g.pdfIn PDF document text
    • https://titepusigob.weebly.com/uploads/1/3/5/3/135392267/baxag_dafumafifesu_rulebipisol.pdfIn PDF document text
    • https://duwatazajopi.weebly.com/uploads/1/3/4/2/134235013/zidesitip.pdfIn PDF document text
    • https://sibanomo.weebly.com/uploads/1/3/0/9/130969588/e58e3cb3.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/bp1Shcl/battle_royale_games_mobile.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/sunbeam_fan_forced_heater_walmart82cia.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/hjgdBje/83574528580.pdfIn PDF document text
    • https://xubikorapaja.weebly.com/uploads/1/3/4/3/134335605/mujuwizewikep-fupepexitokob-bunena.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/60d093ed65bc4.pdfIn PDF document text
    • https://cdn.sqhk.co/worijekegir/eFYEihu/mobile_performance_testing_using_blazemeter.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/wakikezafuwutabiwivihms4h.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/Lphcrwg/calvinism_vs_reformed_theology.pdfIn PDF document text
    • http://nowtorrentz.com/mtd_mower_deck_nzsyo2n.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/gusule/53984902038.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/ragabolamekuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/malilopixevoz.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_0a7be0715e4846c29a36764f5c765121.pdf?index=trueIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_a4f7a1fce97346e5b8e62cea7470c0c0.pdf?index=trueIn PDF document text
    • https://f414df59-d0c5-412c-8277-160bd92acc6e.filesusr.com/ugd/055bb3_f46cafaf2d6749669599d82be076ff6d.pdf?index=trueIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_7a7e49a7109848d793829131bf24bf98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/where_to_get_a_miele_vacuum_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/celestron_21062_astromaster_70_eq_refractor_telescope_review.pdfIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_d542fb022d044ae49bf7a7801c05d768.pdf?index=trueIn 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_off0001141b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141B 5488 bytes
SHA-256: 198dc481845185d57887d70eba867eb764940aca5329106a2fd02a8ad58ab924
font_01_sfnt_off000126ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126ED 12308 bytes
SHA-256: d41b62b47fc982fbe762d1d13950b28c220d6d2de0708b281bf3f2c36b2835d9