Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1542bd7bb52d35b…

MALICIOUS

PDF

86.2 KB Created: 2021-05-18 06:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42a9ada968ed07c43b1cadefdcd724ca SHA-1: 36f522c5ba6d0c9ac2a7e159d86289d1c5b7fa0a SHA-256: d1542bd7bb52d35b94331d9694fa546cbe3ccdf83603a59b01c14dc845a11c20
136 Risk Score

Malware Insights

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

The PDF contains lures for an advance-fee scam, specifically related to job interview questions and parcel delivery. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL points to a suspicious domain, likely serving as a download or redirection point for the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://nipisod.ru/strik?utm_term=tcs+interview+questions+and+answers+for+freshers+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4423154/normal_6040fa32edd2b.pdf
    • https://cdn-cms.f-static.net/uploads/4386366/normal_600ab5a5eaaa2.pdf
    • https://cdn-cms.f-static.net/uploads/4390330/normal_606e482d12073.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/916936c9-3e2c-480a-9244-356b2537bf98/27806563829.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/wavenudakizevegorum.pdf
    • https://s3.amazonaws.com/fuwawibu/81842441767.pdf
    • https://uploads.strikinglycdn.com/files/c99a130d-516a-4153-8cc0-e254a73528b4/how_to_use_open_office_writer.pdf
    • https://uploads.strikinglycdn.com/files/9b395d7a-87ce-4e34-ad48-b9a7eb1c96cb/vakatolixapeguxe.pdf
    • https://s3.amazonaws.com/nonipesikiri/vinsanity_shred_diet.pdf
    • https://uploads.strikinglycdn.com/files/a8f37919-1572-40cd-b945-d24fe4c3d2b5/lebajibelexoxuxibuwizipi.pdf
    • https://s3.amazonaws.com/wipotegadodorek/50272819354.pdf
    • https://uploads.strikinglycdn.com/files/b612bcb5-b9de-4170-9407-96490917e0aa/97484758607.pdf
    • https://s3.amazonaws.com/rolefosiju/cafeteria_nipponica_apk_mod_2._0._5.pdf
    • https://s3.amazonaws.com/lezerawe/gaap_guidelines_for_self_constructed_assets.pdf
    • https://s3.amazonaws.com/tapexiw/53046161133.pdf
    • https://uploads.strikinglycdn.com/files/bb216fa0-b68a-4682-a67f-7c2deba87538/how_to_cook_rainbow_trout_fillets_on_the_grill.pdf
    • https://s3.amazonaws.com/resisuna/fipijezirenojavazolukiwa.pdf
    • https://s3.amazonaws.com/nafoxuda/lataluvatonemazujile.pdf
    • https://uploads.strikinglycdn.com/files/ebd4594a-a07c-42a8-9e68-cd303851f213/wobumasofanexenawewadalo.pdf
    • https://s3.amazonaws.com/tibitexil/rupinafigenebuwudin.pdf
    • https://s3.amazonaws.com/ditiruz/41728503274.pdf
    • https://s3.amazonaws.com/teximikamukubo/gb_whatsapp_7._20_version.pdf
    • https://uploads.strikinglycdn.com/files/9f66f802-5adb-461a-afad-36a16919da70/rixujewibetegisigawomaguw.pdf
    • https://s3.amazonaws.com/bitajemisajoz/why_was_the_berenstain_bears_cancelled.pdf
    • 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_off00010325.bin
8116c29934ddfa18f11b893cd7ae2ee4368bfab7191e501a685374c1b5934c74
pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 5352 bytes
font_01_sfnt_off0001155a.bin
6cd8718df40fd8a2cab98fd3654338db6b664a24d7599a3f9c001ccea68ec245
pdf-font-stream PDF embedded font (sfnt) at offset 0x1155A 11912 bytes
font_02_sfnt_off00013cb6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB6 4324 bytes