Malicious PDF — malware analysis report

Static analysis result for SHA-256 be058422ef38cd82…

MALICIOUS

PDF

89.7 KB Created: 2021-03-01 08:34:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 161dc282d75b94ba87594f0c06f1b041 SHA-1: 416001cb444df6405487bb5373212b13755b48bd SHA-256: be058422ef38cd82890ea21b8a85d7126c3a2565d3f06e2fe26f99c8cea96d66
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, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to product reviews, likely serving as a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/aws?utm_term=bissell+powerforce+helix+turbo+bagless+vacuum+2190+reviews PDF link annotation
    • http://idealicaitalia-official.site/the_chrysanthemums_by_john_steinbeckfy77z.pdfIn PDF document text
    • https://xunopigiwigon.weebly.com/uploads/1/3/1/6/131636761/5c3adb4494cd.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/home_zone_motion_activated_led_security_light_-_2500_lumens_manual.pdfIn PDF document text
    • https://voxukosobezut.weebly.com/uploads/1/3/4/8/134846839/1618347.pdfIn PDF document text
    • http://trujillostacoshop.com/5715048715605is.pdfIn PDF document text
    • http://mestorating.ru/bakawadiriy94od.pdfIn PDF document text
    • https://nobenore.weebly.com/uploads/1/3/2/6/132696051/bafidabejebidof_xerekizitovare.pdfIn PDF document text
    • http://ag-management.space/44089141688jinyi.pdfIn PDF document text
    • https://gatikewud.weebly.com/uploads/1/3/4/3/134382011/golukewuwukadikom.pdfIn PDF document text
    • http://masalev.ru/tazubogolagizixizqe1yn.pdfIn PDF document text
    • http://zonixutazexe.iblogger.org/timetozeraxozurenuge.pdfIn PDF document text
    • http://wozoxudo.iblogger.org/how_to_treat_blood_eye.pdfIn PDF document text
    • https://sidedelozamuk.weebly.com/uploads/1/3/1/4/131482822/xijokupe.pdfIn PDF document text
    • http://gupirigugorixuf.sportsontheweb.net/ffxiv_the_great_hunt_extreme_unsync.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wekibik/silaziwuxelikuvekudul.pdfIn PDF document text
    • http://pimizebogo.rf.gd/happier_ed_sheeran_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/47698065049.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/call_of_duty_modern_warfare_beta_dates.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/top_football_games_for_android_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/bolagomudub.pdfIn PDF document text
    • http://wewepov.rf.gd/asvab_for_dummies_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 6096 bytes
SHA-256: b1b51fc9dfe9a0cf5d96f8223ac7bcf0de7cd5aaf2f472136ddc94dadad4aa43
font_01_sfnt_off0001221f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221F 12360 bytes
SHA-256: 0121763b97c1e83f37f0aec09788a1c35194a8730b5f06d4ca6677d45405c70d
font_02_sfnt_off00014a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A57 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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