Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5d6695994d7618e…

MALICIOUS

PDF

75.5 KB Created: 2021-03-15 04:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aab00cb60f4d9479cb6366bc5c69f5f1 SHA-1: 151b3481db9f12acfdb50f26bf5714fd8ea64738 SHA-256: d5d6695994d7618e157fa3071775fe44a508d9b216970d5b41e4ef9b7cbed279
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is designed to trick users into believing they have won a prize or are due a large sum of money, requiring them to pay a fee or provide information to receive it. The PDF also contains a large number of external links, suggesting a link farm or phishing attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=what+legal+obligations+does+a+trustee+have
    • http://zonitupupafof.sportsontheweb.net/suvolajisabogudaz.pdf
    • http://zoxuruje.sportsontheweb.net/sipobotazojujuganivarulag.pdf
    • http://vivekawiga.sportsontheweb.net/how_to_download_and_install_sims_3_expansion_packs_for_free.pdf
    • https://gebevomipo.weebly.com/uploads/1/3/0/7/130740462/318919.pdf
    • http://duwosolutanuz.mypressonline.com/gawukenule.pdf
    • http://fofiwafajelerax.sportsontheweb.net/mastering_bitcoin_free.pdf
    • https://lepitedow.weebly.com/uploads/1/3/4/8/134885181/8890179.pdf
    • http://wulutapebime.getenjoyment.net/10602917410.pdf
    • http://nurokojo.mypressonline.com/how_to_count_number_of_words_in_a_column_in_excel.pdf
    • http://ziwusis.getenjoyment.net/denervation_hypersensitivity_meaning.pdf
    • https://salufisudad.weebly.com/uploads/1/3/2/6/132695294/4820176.pdf
    • http://giwudogor.scienceontheweb.net/gefakereti.pdf
    • http://kugewezebuvigiw.mygamesonline.org/61682998679.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://purezaviwof.myartsonline.com/best_part_daniel_caesar_sheet_music.pdf
    • https://s3.amazonaws.com/gupojakami/abbyy_flexicapture_full.pdf
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_225a8d99720445feac4627280484f58b.pdf?index=true
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_ecfe3a8e494a4877a8fab9af27642545.pdf?index=true
    • https://30c0d994-bee2-4d79-bc91-d4aaa7251653.filesusr.com/ugd/0962d9_8535c5eb341a4ac09eec4f5732f9fa47.pdf?index=true
    • https://s3.amazonaws.com/mexesazaxasa/radiohead_codex_piano_sheet_music.pdf
    • https://2863666b-9d79-467d-9aad-9eeb6dafbdf2.filesusr.com/ugd/6ee3eb_ae2c1537250f413c9d421921a94327a0.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_off0000e808.bin
bcf96e25596cbe2ce4ac459bb99521b8da839b83c74a459bd020f2f94c649152		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 5300 bytes
font_01_sfnt_off0000fa12.bin
2ab26d2dddc085a4b56d031bb59624a4d0a2bc26a03a9f25de4bdc7e02898767		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 11344 bytes

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