Malicious PDF — malware analysis report

Static analysis result for SHA-256 04a26fb8b4ba96ad…

MALICIOUS

PDF

76.1 KB Created: 2021-06-08 19:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ba7ae63725464d4e3b6a86a39ea2e01 SHA-1: d76bf97d2f46713240edf461018de98251e06b93 SHA-256: 04a26fb8b4ba96adf606d1d47b276d6d53400de639c9e98873ea42e1e9c8a28c
156 Risk Score

Malware Insights

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

The PDF file contains a link farm and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The embedded URL 'https://medvor.ru/pbw?utm_term=minecraft+pe+free+download+for+windows+7' suggests a lure to download software, potentially leading to further malicious activity. No scripts were extracted, but the PDF structure and external links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://medvor.ru/pbw?utm_term=minecraft+pe+free+download+for+windows+7
    • https://cdn-cms.f-static.net/uploads/4427077/normal_6064e190926b2.pdf
    • https://cdn-cms.f-static.net/uploads/4383566/normal_604d0b03c500a.pdf
    • https://static.s123-cdn-static.com/uploads/4486042/normal_60045fa4b75a8.pdf
    • https://lazutexex.weebly.com/uploads/1/3/4/3/134380731/9d8ec1f60d.pdf
    • https://static.s123-cdn-static.com/uploads/4391599/normal_5ffb69830b30f.pdf
    • https://toguxobuse.weebly.com/uploads/1/3/4/9/134902292/54632.pdf
    • https://static.s123-cdn-static.com/uploads/4366010/normal_5ff4da4a9603a.pdf
    • https://verosogoteri.weebly.com/uploads/1/3/4/7/134738646/9908622.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/47905df0-0c63-45cb-9906-c86ec0621fa1/how_to_eat_healthy_on_a_budget_and_busy_schedule.pdf
    • http://vowujepojez.pbworks.com/w/file/fetch/144753294/avast_free_license_key_2020.pdf
    • http://kigijujozi.pbworks.com/w/file/fetch/144675750/panasonic_microwave_cyclonic_inverter.pdf
    • https://uploads.strikinglycdn.com/files/1f4fce3e-b5ec-4f7d-ac57-3267325a5a65/which_is_best_technical_analysis_software_in_india.pdf
    • https://uploads.strikinglycdn.com/files/544eb98a-9c08-443b-a8e2-e4d40e8855ed/56145607590.pdf
    • https://uploads.strikinglycdn.com/files/cf5241ee-d0d7-4fa8-bb84-96ab67e50ec7/alternative_energy_wind_power_pros_and_cons.pdf
    • http://pinurakus.pbworks.com/f/kefesugejo.pdf
    • https://uploads.strikinglycdn.com/files/400e6e04-116f-49ec-b860-84c1faf8210d/zonujemel.pdf
    • http://liwuvedesisu.pbworks.com/w/file/fetch/144496578/13360419540.pdf
    • https://uploads.strikinglycdn.com/files/e1b6efb0-4821-4ef9-aec7-c364cdc35fbc/51562598848.pdf
    • http://fawitugeva.pbworks.com/w/file/fetch/144803586/planisferio_con_divisin_poltica_sin_nombres_inegi.pdf
    • https://uploads.strikinglycdn.com/files/f3ae5c9f-dea3-49ae-809b-f4d14433786f/is_harry_potter_movies_available_on_amazon_prime.pdf
    • http://mupalunava.pbworks.com/f/39271905646.pdf
    • http://doxawadar.pbworks.com/f/53303877371.pdf
    • http://wejojixi.pbworks.com/w/file/fetch/144424443/jaxututuwepanu.pdf
    • https://uploads.strikinglycdn.com/files/6108f63f-815d-4724-8916-b9d2a1f0e80f/9908649105.pdf
    • http://joxakuruvi.pbworks.com/f/bijinizogepuxel.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e032.bin
d6c8a4ff19aa8986e3e45799fa6eba29f4fb0479dc09067e5a322a3b8ab58068		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE032 5116 bytes
font_01_sfnt_off0000f1b8.bin
47dc88db2712e7ac357e2de6c4641adf34048d8030a3908f42b8a82df6b54645		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 10292 bytes
font_02_sfnt_off000114ac.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114AC 4324 bytes

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