Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50132a1d0ede7c4…

MALICIOUS

PDF

79.1 KB Created: 2021-03-19 17:52:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49d9a69ed97dc2164cef4f05fa48d840 SHA-1: e3761fa216578653e4e298edec0f89135a221a9b SHA-256: c50132a1d0ede7c4a0f24ccd54a03050ede1f6bdd6eefa10e974921a9659f37b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of embedded JavaScript, although not fully analyzed due to obfuscation, indicates potential for malicious actions such as downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/123?utm_term=maplestory+m+dark+knight+item+guide
    • https://cdn-cms.f-static.net/uploads/4421624/normal_602cd63ab98dd.pdf
    • http://raxejudesezix.scienceontheweb.net/when_does_attack_on_titan_season_4_dub_release_on_hulu.pdf
    • https://cdn-cms.f-static.net/uploads/4485935/normal_6021d7d8cf6db.pdf
    • https://cdn.sqhk.co/vamosopon/GnieBjj/47920431253.pdf
    • https://static.s123-cdn-static.com/uploads/4366628/normal_5ffe6fd4bb8a6.pdf
    • http://liketime.fun/microsoft_excel_2010_basics_for_beginnersby9y4.pdf
    • https://static.s123-cdn-static.com/uploads/4374196/normal_6009450fd4267.pdf
    • http://bapatavusirave.mygamesonline.org/15090104482.pdf
    • http://hookup154.site/53717698284ai22f.pdf
    • https://static.s123-cdn-static.com/uploads/4374002/normal_5ffeb4a502589.pdf
    • http://faripofijukevom.mywebcommunity.org/landslide_information_in.pdf
    • http://4gusevshop.website/how_to_turn_on_black_and_decker_waffle_maker92d5q.pdf
    • http://olymp-trade.top/international_business_machines_jobs3sxko.pdf
    • https://static.s123-cdn-static.com/uploads/4492286/normal_6008e9780e98b.pdf
    • https://cdn.sqhk.co/nenakowi/SeidThB/medical_dictionary_merriam_webster_download.pdf
    • https://cdn.sqhk.co/fimegasaz/2Tqhjmt/candy_jump_game_v2._0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_0d52be7683264e899f6ac7a7996fc964.pdf?index=true
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_bcfd2fb6dfc74a49be4ac00537b9f66d.pdf?index=true
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_159287c0a5044e5c81549e2cb056ab37.pdf?index=true
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_c2e7fe9ffd9a43af9fe8f505904d68c9.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_off0000ed8c.bin
f4c2faa355fe893a2c56f60ee3ead0aa15a4779e4d1cd1ebab5da6f2aa2a94e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 5544 bytes
font_01_sfnt_off00010048.bin
6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 1800 bytes
font_02_sfnt_off000108d8.bin
5cb3550ecb70470a25e5b1a17eb1213861701641fced038180e9e4c355d01b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108D8 10560 bytes

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