Malicious PDF — malware analysis report

Static analysis result for SHA-256 32dc18281e48f7f4…

MALICIOUS

PDF

78.6 KB Created: 2021-03-28 05:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ab5b58331a1cf4b801783ba99f6395ba SHA-1: d344fa5b1a28589754e1ed502b2dd670af148c4b SHA-256: 32dc18281e48f7f49fa524367129720eeeefc064447e41d4bbac8db1040febb3
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. It contains numerous embedded URLs, many pointing to disposable domains, which are characteristic of link farms used to distribute malicious content or conduct phishing campaigns. The presence of external URIs and the link farm heuristic strongly suggest an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=motorola+surfboard+sbg6580+speed PDF link annotation
    • http://jasazotinalol.mygamesonline.org/framed_ink_drawing_and_composition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_601aab7de64ee.pdfIn PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/165eeeedf4c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_600e5ee564f66.pdfIn PDF document text
    • https://cdn.sqhk.co/lepitajirel/hjfHfja/free_gun_fire_unknown_survival_battleground_game_download.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/broiler_feeding_program.pdfIn PDF document text
    • https://murafasonuralab.weebly.com/uploads/1/3/5/3/135398902/nokuwukozarib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_60468463519c1.pdfIn PDF document text
    • http://gayerkan.com/72672360949ccbm2.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/OggvjfM/flud_ad_free_1._8._3._1_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418362/normal_5ff02ba98ee50.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/eidPGid/startup_ranking_framework_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423148/normal_600543da8c6fa.pdfIn PDF document text
    • http://bonusiotsbera.online/73705115814z7awb.pdfIn PDF document text
    • http://rasprodavaika.ru/how_to_be_like_king_daviddyqq0.pdfIn PDF document text
    • http://shopyou.online/633134160094tnqg.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/GghXigd/va_lottery_scratchers_best_odds.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/jurnal_dialypetalae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojogonofar.rf.gd/sbi_atm_card_application_form.pdfIn PDF document text
    • http://rexerikilo.epizy.com/hold_mail_form_us_post_office.pdfIn PDF document text
    • http://sifebitufol.onlinewebshop.net/wicca_a_year_and_a_day.pdfIn PDF document text
    • http://ropisobe.epizy.com/70002353610.pdfIn PDF document text
    • http://ditorodizo.epizy.com/80284051561.pdfIn PDF document text
    • http://gulizut.epizy.com/19065210762.pdfIn PDF document text
    • http://karokifewugasuz.onlinewebshop.net/pisufisomeweruzaladuzuga.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_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 5968 bytes
SHA-256: 343facdcb5fd5307af5cd642efcfffc42f2f79cc3f31988f5f164ffaee190d85
font_01_sfnt_off0001064c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064C 10964 bytes
SHA-256: 12720437e3e35efb57f748e2413dfdf49f48cacaf6cb6e1bee92ebbc9be9e75e

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