Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd902f87758d1690…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 18:01:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7e3859cb32d007b6523ad52c8864287d SHA-1: d2bc751074d628c1325bc0a9aa293d2e577a12c4 SHA-256: fd902f87758d1690076672062825e8285d131c969b073afb7345d7701397464f
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically flagged as an external URI pointing to 'seumenha.ru'. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of link farming on disposable hosting, suggesting a deceptive purpose. While no scripts were directly extracted, the ML classifier strongly indicates maliciousness, and the overall structure points towards a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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/wix?keyword=compare+iroquois+and+algonquin PDF link annotation
    • http://telgrm.site/739997371022ejf2.pdfIn PDF document text
    • http://nixiziloge.iblogger.org/barcelona_metro_zone_map.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://jajosez.iblogger.org/national_gypsum_vinyl_covered_sheetrock.pdfIn PDF document text
    • http://vuwulaviwu.iblogger.org/nonemilawulekorobef.pdfIn PDF document text
    • http://roskycnmx.com/59445919387sutud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://383fd46b-cc41-47b7-9379-19c19d7bb1fe.filesusr.com/ugd/81c43a_d2701713da424f12bdde9195d2523fe4.pdf?index=trueIn PDF document text
    • http://tejujusaruke.epizy.com/words_meaning_in_english.pdfIn PDF document text
    • http://rawozenagi.epizy.com/77356453996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9baa871e-6bf0-4022-974c-8bacad2da996/sig_p226_nightmare_9mm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe128b0-cad1-47ec-aa99-f703461f36a7/57709239332.pdfIn PDF document text
    • https://761e60ea-5e0e-4c43-b4c2-f6a9045c608d.filesusr.com/ugd/545033_9a7e87c39641459d894f1ccea5e149df.pdf?index=trueIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_e71e5cb385e84c9e8731d2e064672557.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_bb25f0858ab24b83a65df40612b6a832.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_284406dd0d2f4d9d8ec9d211653f3380.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbce6b54-7efb-45ac-a2a2-68654aa64ed8/samsung_rf268abrs_parts.pdfIn PDF document text
    • https://f0ddeb88-3549-4a27-8821-6e3dd713f165.filesusr.com/ugd/2b74da_6cfc9934ee134badaa6fda37ca8ec1f1.pdf?index=trueIn PDF document text
    • http://setobefo.epizy.com/credit_risk_measurement.pdfIn PDF document text
    • http://zopegekole.rf.gd/minecraft_venice_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee46ab4-0ccb-4ac0-9e42-af4df82a07e9/78394370556.pdfIn PDF document text
    • http://madukavinoxonal.epizy.com/purovubipezex.pdfIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_2455ec3ff8f14e95ad4545b3fa3000e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bafc31e-5361-466e-81f2-f0533f75d35c/game_of_thrones_season_8_episode_4_free_download_reddit.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_off0000f559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF559 5312 bytes
SHA-256: b1564d83dd7784b72e4eed0b17b606f9738bb5ef2bb2c4b6aae8796d7ecb79b6
font_01_sfnt_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 11452 bytes
SHA-256: bff237c1ffd29b1905d69ac8ea9c51c2d5f47d14e1186f2b325a13c768bab1c5