Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d82a99d240049e6…

MALICIOUS

PDF

129.5 KB Created: 2021-04-02 15:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 594a2160614d5e18a2314b801db56b85 SHA-1: 56e2d2820e5cc0d2607242eb171388704e3705d2 SHA-256: 1d82a99d240049e6281d0dfc0356cb53e1aad72e68403a55346481ef7ea84a6f
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, with one prominent URL pointing to a link farm designed to redirect users to potentially malicious content. The document's structure and embedded links suggest it is part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://golowaki.ru/award?keyword=akira+manga+completo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423189/normal_6055bae2a18a0.pdfIn PDF document text
    • https://cdn.sqhk.co/detazido/ij05Bib/livisevemosofatubanidupuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469365/normal_60593ee1a5e0f.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/8664708668.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_6043e89d49c0b.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/63929292660.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/jdhgiiE/neon_field_hockey_sticks_clipart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472186/normal_6022410708781.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/ZjieibP/ballinger_isd_jobs.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/sql_server_analytic_functions.pdfIn PDF document text
    • https://cdn.sqhk.co/suxumeva/zxieeha/48750988344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5ff58e06d9c31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tutalagu.rf.gd/lilinazafadapuwukolelor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b874bd-ef3c-4888-9328-d68fca4c074e/is_weider_prime_a_good_product.pdfIn PDF document text
    • https://8ee4d174-735f-4cd7-9396-c3a65dbcc337.filesusr.com/ugd/5ac313_1e0eab3c66d340dbbabf8b4b47ac9871.pdf?index=trueIn PDF document text
    • http://marivugedada.epizy.com/wazemijizogivijaxelefow.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_66830d20b54b4f389a1f44bf3a36ffcf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb4ba23-8a54-45a9-92d4-57cbc2188da7/desobuzipijolumen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f3a422-39b5-4755-9021-8381f564b18f/pabifulive.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/anemia_causes_symptoms_and_treatment.pdfIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_f9f6adc8a9cf45f29f113a4b705a8ff9.pdf?index=trueIn PDF document text
    • http://metiguwuwezaza.atwebpages.com/puzonilenopudare.pdfIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_96edcf31334946b4b0833b043c637493.pdf?index=trueIn PDF document text
    • http://nepafex.epizy.com/asrock_g41m-_vs3_motherboard_lan_drivers_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33671f67-2252-4c46-9ff6-e6095a27d106/fedufase.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_off0001761a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1761A 21108 bytes
SHA-256: 98715a0b0e5da0df254f9edfb7f6f794f23d39fdc680f57c16953406cc46756a
font_01_sfnt_off0001b97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B97E 5352 bytes
SHA-256: 607dfe265fe482399795c9c564ec1848a1a9886544829323568edcd7f85c0818
font_02_sfnt_off0001cba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBA4 14180 bytes
SHA-256: c53353b1ff711f2709539165c3fb71983eb603d615833d7ab828b9c7298f3c3e