Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a92acb20cdbd68…

MALICIOUS

PDF

84.2 KB Created: 2021-04-01 22:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8427d8fc1d99739fdaf24037c3b0101a SHA-1: d42f39252a8c4cac7390c6a6326d1b1a1385671a SHA-256: 86a92acb20cdbd68b3db956972d43ba2cdde3443b527aba96a39415228b0046f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with the primary URL being a lure for 'daily business english conversation pdf'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting a phishing or SEO spam campaign. While no scripts were explicitly extracted, the presence of external links and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/award?keyword=daily+business+english+conversation+pdf
    • http://moresukko.ru/90540999827fw7pr.pdf
    • http://online-sistem.site/76511225760l151g.pdf
    • http://my-favshopg.online/is_bernina_the_best_sewing_machine6m2jx.pdf
    • http://tlgfree.xyz/attack_on_titan_season_2_episode_6_explainedkkkoi.pdf
    • http://genusttwsr.fun/litaniae_sanctorum_partitionrn2ts.pdf
    • http://tipografiyav.moscow/the_crucible_unit_planlg7ms.pdf
    • http://reduslim-europa.site/a_handbook_on_civil_engineering_made_easy_publications_free_download1186a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vorofij.epizy.com/interview_questions_and_answers_for_administrative_officer.pdf
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_0c138a3d15144cdead9120a475bf67cf.pdf?index=true
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_d0a3de157b71475f9eee614d21086d5a.pdf?index=true
    • http://vukefuxi.epizy.com/eastspring_monthly_income_plan_factsheet.pdf
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_c4470bada13e4787b2a9f0747b5796c2.pdf?index=true
    • https://s3.amazonaws.com/wanasuvedigo/vilenetonosipawiba.pdf
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_09742e5588564e208a2d11b662612ae3.pdf?index=true
    • https://s3.amazonaws.com/megujobemegor/8980787333.pdf
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_f8139ef227104714a5f0c3efb88cc54f.pdf?index=true
    • https://s3.amazonaws.com/nemafu/pimetapu.pdf
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_b77754afe6c84154938d13ecffbd9145.pdf?index=true
    • http://gijifosunusu.epizy.com/zolato.pdf
    • https://s3.amazonaws.com/dobikasukavu/cyberpunk_2077_delayed_again_2021.pdf
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_05bf4b4b9e334b4ca3529e7955443a0b.pdf?index=true
    • http://daxukutotexodu.rf.gd/98259592860.pdf
    • http://vumonugita.rf.gd/wunderdog_nba_computer_picks.pdf
    • https://s3.amazonaws.com/tabobujimo/jezovomulovodibabe.pdf
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_458606ae0ef74068a268b5ddf2bc5fa5.pdf?index=true
    • 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_off0000fd5f.bin
f0e30a46a7f83634239df65a193063c54b5069c2e1c2f0817d4ee378ec085417		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 5600 bytes
font_01_sfnt_off0001105d.bin
6454e42504c2bd2d325a2ffbff3fb7842a603c995b39f65b444c81719ab165f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1105D 10600 bytes
font_02_sfnt_off000134c4.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134C4 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.