Malicious PDF — malware analysis report

Static analysis result for SHA-256 4524201cea973a72…

MALICIOUS

PDF

80.6 KB Created: 2021-03-15 11:10:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2181c64aa2c540d215621d408d00b34 SHA-1: e44da5dceb892d51617efc8dd9f82f870e17ef1f SHA-256: 4524201cea973a72715bd553e33ef3b755b5b982cd7d1d8fbf45a4bb56ff31d5
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document exhibits characteristics of an advance-fee scam and a recovery secret lure. It contains numerous external links, suggesting a link farm or redirection mechanism, and is flagged by multiple heuristics for malicious content and phishing attempts. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish for sensitive recovery information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=oops+concepts+in+java+examples
    • https://jipafopabos.weebly.com/uploads/1/3/3/9/133986828/pulijapilisexa-rovolow-zugasinan.pdf
    • http://pemirok.22web.org/bigowoximevevate.pdf
    • https://rifodomofakape.weebly.com/uploads/1/3/4/6/134627700/937344.pdf
    • https://domaruvujus.weebly.com/uploads/1/3/2/6/132683142/7a5c9119.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_7067574b7c1245168501165c16c0e03b.pdf?index=true
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_6ab9765dff474b96b0109715010a1199.pdf?index=true
    • https://s3.amazonaws.com/geraromu/62445407208.pdf
    • http://pubavutogazukid.epizy.com/tizen.pdf
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_22b5d09f6b2646d4a7eab195495cd166.pdf?index=true
    • https://s3.amazonaws.com/popisiburewixuj/why_is_nespresso_machine_not_working.pdf
    • https://s3.amazonaws.com/paropabaru/aruba_controller_cli_guide.pdf
    • https://s3.amazonaws.com/jinotugiwomo/64014780803.pdf
    • http://tofezininas.rf.gd/67300532642.pdf
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_f638b432b4c343848bfdcddd2f91a6dc.pdf?index=true
    • https://62dace35-232c-43a2-b3e8-6cf19ad57148.filesusr.com/ugd/42ae31_b0f85644a5aa45378ad0915cbbd52fc7.pdf?index=true
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_01cc4bfc9233457eaa0582c9868e21c4.pdf?index=true
    • http://dadojusox.epizy.com/kalash_serial_all_song.pdf
    • http://parekiwebepis.epizy.com/zozuz.pdf
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_db13b8a3563b4f6d8b900e9518298154.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_off0000fa97.bin
6c754a8c849ae7322daaea23669eb39d4d4ec6fd95b0d9c9594a6e19e7bc3e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA97 5212 bytes
font_01_sfnt_off00010c4e.bin
2f133ab280101206df83f0d1705e25c7dd8ce409960f1f17b798ef3850d18e24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4E 11616 bytes

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