Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2402fd56422c7f…

MALICIOUS

PDF

82.5 KB Created: 2021-03-15 02:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0400760351db42c3b721b3aa896bfc9d SHA-1: bdc1ccb0b02091ba9d9c530b34bc636a7a218bf8 SHA-256: ac2402fd56422c7f71a7da068678288c01ebfaa133a2a7c67c31a80768703932
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to a search query, likely intended to redirect the user to a phishing or malware distribution site. The presence of external URIs and the link farm heuristic indicate a strong intent to redirect users to malicious content.

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://seumenha.ru/strik?utm_term=what+does+a+discoloured+tooth+mean PDF link annotation
    • https://cdn.sqhk.co/zejejofe/bShjNjh/unicorn_photography_brini.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/c2fefb5.pdfIn PDF document text
    • http://xojetupamowub.iblogger.org/lokumuliroto.pdfIn PDF document text
    • https://jukovuwivoxufab.weebly.com/uploads/1/3/3/9/133997180/7837992.pdfIn PDF document text
    • http://sunipemumax.66ghz.com/retowogatokunuwiv.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/dgfhihi/mtn_cheap_international_call_rates.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/gjfhggh/ballsy_synonym_urban_dictionary.pdfIn PDF document text
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/ludivir.pdfIn PDF document text
    • http://kegolij.iblogger.org/how_to_play_blackjack_table.pdfIn PDF document text
    • https://cdn.sqhk.co/fojupigek/ggighjc/dialogue_in_a_story_definition.pdfIn PDF document text
    • https://zupevinar.weebly.com/uploads/1/3/0/7/130739631/lozadago-dakewawajigum-tofunak.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/bMghgP5/animal_feed_science_and_technology_journal_abbreviation.pdfIn PDF document text
    • http://soldonlakewood.com/kuwogu8yyl2.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/amass_xt601ln01.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/tumasun/up_deled_syllabus_2019.pdfIn PDF document text
    • http://gadazowowotogug.rf.gd/visorusomuzeke.pdfIn PDF document text
    • http://pirajog.epizy.com/trader_giotto_bambino_pizza_formaggio.pdfIn PDF document text
    • http://tiwisuk.epizy.com/xepowivebepifureranup.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/meaning_correct_answer.pdfIn PDF document text
    • http://sujevulakaginig.rf.gd/fevekawifapugamenaxivaru.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/proform_treadmill_calories_burned_calculator.pdfIn PDF document text
    • http://sowezenuvafe.epizy.com/black_and_decker_detail_sander_sandpaper.pdfIn PDF document text
    • http://gizugutopaf.epizy.com/zabavise.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EE 5192 bytes
SHA-256: 7eb48f1fe2fbb483638fede55cb0fe259d475761def0f95cf3ba82d9453a9db8
font_01_sfnt_off0001177a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177A 11096 bytes
SHA-256: 1b6553cedd559beaf9f978f9b058e34fb1e73578d828a8a555c06f707956f7cb

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