Malicious PDF — malware analysis report

Static analysis result for SHA-256 a88c376ec0ae8be2…

MALICIOUS

PDF

115.2 KB Created: 2021-03-15 02:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6378a9c1586d39aaaab44a5da5c28e75 SHA-1: c86b1a2d94f4eb5e430fc1164b94651b7a6d35ed SHA-256: a88c376ec0ae8be2e578b1a34282adec8a6ff5ad2689d03db0c84ab1f19c4937
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous domains, one of which is identified as potentially malicious. The document body, though heavily obfuscated, suggests a lure related to 'Java programming' to mask the phishing or spamming activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/award?keyword=collection+framework+in+java+pdf+ebook PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384650/normal_5fdfb88e6ffe8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501503/normal_6008cd4d1f460.pdfIn PDF document text
    • http://bonboxstudio.com/alfabeto_coreano_hangul8gyh7.pdfIn PDF document text
    • http://itasummer.fun/63883009212s80h7.pdfIn PDF document text
    • http://segway-wheelchair.ru/39797937758wbu9b.pdfIn PDF document text
    • http://muzoc.xyz/ferukufolalivoliwojod0ssh.pdfIn PDF document text
    • http://amorexpo.com/citadels_medieval_war_strategy_with_pvpa48kz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_6004d2238c88f.pdfIn PDF document text
    • http://nasty666.space/fillable_landscaping_invoice_templatewfejn.pdfIn PDF document text
    • http://robertferrell.net/88740542651gqjx3.pdfIn PDF document text
    • http://persequenteamsohbet.com/51821622242secnv.pdfIn PDF document text
    • http://videohost.space/how_to_play_usb_on_jvc_tv0u5pi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_5b88b816c234471bb2ad61b1c6582908.pdf?index=trueIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_8aa9cc7f1c954c2190bb75a0518fb752.pdf?index=trueIn PDF document text
    • http://wemaxoseni.myartsonline.com/3-1_study_guide_and_intervention_graphing_linear_equations_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/hp_deskjet_3050_wireless_setup_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/51084352650.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/togolixegexavugek.pdfIn PDF document text
    • https://53860ffb-5975-4088-b838-5c82367c2827.filesusr.com/ugd/0d2908_3ee187da6d3142e5bc3dae27cecc5010.pdf?index=trueIn PDF document text
    • http://donijexufenu.onlinewebshop.net/adjectives_worksheets_for_class_4.pdfIn PDF document text
    • https://60bf9f63-c9a1-408e-a1ad-d98398230301.filesusr.com/ugd/a07927_e1a635f9688243cd99e0882373021792.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/fedekalamorifototaruko.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/zewujinukewomelabisa.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_off00017504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17504 5364 bytes
SHA-256: fcfc97b6acbb5c84e8a3faebf1fcf1017bbd471e29e752c42ae7623bffc9fbc6
font_01_sfnt_off0001873a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1873A 12044 bytes
SHA-256: d507a2dc43fc810282c8bbdee86f1ac9feaf9cbfab066dfe1e4f1d8ff8ef1a60
font_02_sfnt_off0001b033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B033 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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