Malicious PDF — malware analysis report

Static analysis result for SHA-256 b149006688ce61d0…

MALICIOUS

PDF

79.9 KB Created: 2021-02-26 08:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 79951520e12e904b4e37cee1e2aa84b2 SHA-1: 9d2549753afaa3c47a11623586f021497dd3611f SHA-256: b149006688ce61d00b9e44b31f644a3b3ea6254b115bca3e6de113308438d640
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a movie synopsis, aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=farewell+my+lovely+synopsis PDF link annotation
    • http://whysmall.space/interview_form_template_malaysiav3z47.pdfIn PDF document text
    • http://dietnatur.fun/w3schools_python_if_loopwqvks.pdfIn PDF document text
    • http://ita-women.space/box_and_whisker_plot_examples_with_answersybzi3.pdfIn PDF document text
    • http://1pokypki.website/myanmar_tv_sport_apkpzl6c.pdfIn PDF document text
    • http://vorecan.fun/kkrtma_filmi_izle_trke_dublaj_tek_para3y53s.pdfIn PDF document text
    • http://magnitoli-2ekran.site/86026487613xi6jd.pdfIn PDF document text
    • http://atlas-copco.su/tratamento_roacutan_e_lcool4cqr4.pdfIn PDF document text
    • http://nature-ital.space/186891799633k2qn.pdfIn PDF document text
    • http://tudewulowas.iblogger.org/monster_hunter_world_hunting_horn_guide.pdfIn PDF document text
    • http://netewe8.xyz/46686658632xh01u.pdfIn PDF document text
    • http://wildboost.club/lafuxefiv4oak6.pdfIn PDF document text
    • http://sis-paypal.com/intellij_format_code_all_files7d4lz.pdfIn PDF document text
    • http://copyright-notice-ig.com/42810053978dhxis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vedanasori.rf.gd/71243554.pdfIn PDF document text
    • http://bijasubibivov.rf.gd/adobe_spark_video_android_alternative.pdfIn PDF document text
    • http://kidogip.epizy.com/76777457457.pdfIn PDF document text
    • http://voxinuxo.epizy.com/nafuseliwiwu.pdfIn PDF document text
    • http://visiresape.epizy.com/masterpiece_malayalam_movie_box_office_collection_report.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_off0000fcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 5172 bytes
SHA-256: f734e6b0c5aa141bd04181debf5b7d1c7fe8a8f5aa1946295abfd581b7e0cee6
font_01_sfnt_off00010e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E67 10424 bytes
SHA-256: 9c99eaf0c9f5f10348397046999db0a1c284a19b557c24840f72b7e11a635805

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