Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ab244da860ef071…

MALICIOUS

PDF

80.7 KB Created: 2021-04-06 23:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 80a308b003a7ef5eacd90d3545673c11 SHA-1: 67791522423bf827e96a5b3a762b05cce045f54c SHA-256: 9ab244da860ef07126d0163e4f99f2454f4649857f6d410aedf572f86bf7ac5a
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on potentially untrustworthy domains, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=good+and+cheap+cookbook+free+pdf PDF link annotation
    • http://lnstagramcopyrigtservice.com/bamamitujekitogarerkv65.pdfIn PDF document text
    • http://inostrana.com/wubalaxelovonapewopewapidbg3lo.pdfIn PDF document text
    • https://gegefajowib.weebly.com/uploads/1/3/1/3/131380265/safobopuf.pdfIn PDF document text
    • https://cdn.sqhk.co/kavevanix/YE1gghj/simplifying_fractions_worksheet_2_answers.pdfIn PDF document text
    • http://milesnires.xyz/how_do_i_set_my_suunto_core_watch3blz4.pdfIn PDF document text
    • https://punerumoluzes.weebly.com/uploads/1/3/4/8/134897399/a7093e2e8b.pdfIn PDF document text
    • http://aires.fun/invisible_cities_operakquo2.pdfIn PDF document text
    • https://dupubevanedi.weebly.com/uploads/1/3/4/6/134649007/957fc2809a2dabb.pdfIn PDF document text
    • http://remastacer.com/2004_fleetwood_pioneer_travel_trailer_owners_manualu4vdn.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/gcuZgh7/11_street_diner_miami_beach_fl.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/tabla_de_densidad_de_fluidosbbavi.pdfIn PDF document text
    • https://vujufosidomo.weebly.com/uploads/1/3/1/4/131482916/4423464.pdfIn PDF document text
    • https://nawolokiwepona.weebly.com/uploads/1/3/2/8/132814855/weruburopisepuw_nasaxotatin.pdfIn PDF document text
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/81582.pdfIn PDF document text
    • http://golden-bridge.pro/adobe_creative_suite_for_mac_price7woow.pdfIn PDF document text
    • https://fubagodesipura.weebly.com/uploads/1/3/4/3/134326772/palogupexidugi_voxovobo_wegusanurawu_komapi.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/jMhe4G0/9688998931.pdfIn PDF document text
    • http://tryplafond.xyz/78937650269900g7.pdfIn PDF document text
    • http://rimka.xyz/bd_jm57c_samsungy6hhy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bee18c3-39d8-4885-9582-8d64572f0085/pijavikediwogof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ae1a09-9b6e-41ef-8fd0-88c3863a7a0c/40006624785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98226a6d-4855-4ff1-818c-4e481f6bd9a1/electrolux_central_vacuum_repair_locations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b4cd95-0acc-4d50-912a-0697f61859bf/91388208656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e2d655a-2036-4237-9afa-554207a79253/abstract_noun_worksheet_for_grade_5_with_answers.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_off0000fb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 5268 bytes
SHA-256: 792604e0234c4d42d1402012c2bebb09b61950a4a2550e970509638a7134f67a
font_01_sfnt_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 11980 bytes
SHA-256: 2f6d685f2427efbabffa754934b48d7a911a6c0776762d877ae1477e7fb72670