Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df331e3699f854b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 01:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f96291ddb104eb2d857953c92ebef5e9 SHA-1: e4626e7531aab1afe27f6646140c66e4f47976bd SHA-256: 5df331e3699f854bfd1150463cdbc83e5ae8f8ea7c013cedfd5d87fe55184e35
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicative of a link farm or phishing attempt, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's content is designed to trick users into believing they have won a prize or are due a parcel, requiring them to click a link to claim it. No scripts were extracted, but the presence of many external URLs points to a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jumiwimov.ru/award?keyword=agile+project+management+with+scrum+microsoft+pdf
    • http://jekeluxuto.mywebcommunity.org/2010_camaro_ss_for_sale_los_angeles.pdf
    • http://tenipimutav.mywebcommunity.org/jodexure.pdf
    • https://cdn.sqhk.co/nuroteditu/hcdjh2k/muduwuwebabebav.pdf
    • http://shortsomfj.space/applied_informatics_software_engineering_gmbh2169b.pdf
    • http://galajanexagaj.iblogger.org/even_odd_identities_worksheet.pdf
    • https://cdn.sqhk.co/vavetiset/rzidhhd/correlation_and_research_methods_review_worksheet_answers.pdf
    • https://cdn.sqhk.co/fofateze/ahhehHW/marvel_contest_of_champions_comic_wiki.pdf
    • https://cdn.sqhk.co/tefazaturar/7jioFo6/47707391537.pdf
    • https://cdn.sqhk.co/sofetarunox/ia2oSVo/93749499799.pdf
    • http://kovuzaxaf.medianewsonline.com/jajupugegasujugimabef.pdf
    • http://serdyukov.pro/b_arch_previous_year_question_paper_download5i8ue.pdf
    • http://kojibataruv.iblogger.org/93259113093.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_3e8a20ecce26435c9c76569170689d4c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/39ced08d-595a-4215-90c7-2877ed3348af/how_to_get_adobe_photoshop_free_for_students.pdf
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_21009cffd4d940a2af395b46e398263b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c474d469-8884-4838-b949-31c8b07c67c3/46762864664.pdf
    • http://bopewexe.onlinewebshop.net/mixture_and_alligation_problems_tricks.pdf
    • https://89511c73-251b-4bee-a1a5-5f4bd4863124.filesusr.com/ugd/f24cb8_e230db42234a4daf9adc7b653dcca68a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6a.bin
6aa0f875567761ccd3d467dc34c9f167c2209a82033980967cd71a5eae52188e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6A 5724 bytes
font_01_sfnt_off000101d3.bin
f06c04e3e23e4ecf1d8aebafa0ebc292a90439a3fd04f9c130f8a7946c5f3d48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D3 10580 bytes

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