Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8663986f917d58…

MALICIOUS

PDF

104.5 KB Created: 2020-11-17 03:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30220340bd2c95d5c8470ad9d49baacd SHA-1: d7698f53a921701aa99db61198afe412bd6eb66b SHA-256: 5b8663986f917d58ddb6cc6bdb3ac83a0e9d7b2ddc873ab7b8a569516703c267
196 Risk Score

Malware Insights

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

The file is a PDF that uses a lure related to a 'Kenmore dishwasher model 587 manual' to trick users. Heuristics indicate it's part of an advance-fee scam, likely directing users to external links. The PDF contains a large number of external links, with one prominent URL being trafffi.ru, which is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/123?utm_term=kenmore+dishwasher+model+587+manual
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fa3af118e5f6.pdf
    • https://cdn-cms.f-static.net/uploads/4413701/normal_5f95f1ba59ffc.pdf
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f911dd6844d9.pdf
    • https://cdn-cms.f-static.net/uploads/4389080/normal_5f8ff5a594212.pdf
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/35b4f1600cf.pdf
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/6173703.pdf
    • https://cdn-cms.f-static.net/uploads/4457590/normal_5fa61d2e89a7b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/davawina/bunowexoke.pdf
    • https://s3.amazonaws.com/limepusotanal/drawing_circuit_diagrams_worksheet.pdf
    • https://s3.amazonaws.com/wixamupelinere/cupcake_song_by_mohit_gaur_ringtone.pdf
    • https://s3.amazonaws.com/vezumobigodub/tezevafevemabit.pdf
    • https://s3.amazonaws.com/bupijila/6599608983.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_off00014ae8.bin
75fedcea2e3565b8b4c8363bdbf74d9142608f1763aedfc619789d67e6691e40
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE8 5324 bytes
font_01_sfnt_off00015ce6.bin
832a069e5696a7ab3fce309e2f6c0e47d78f65b155d0a1ffa4026c8031b2c4b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE6 12816 bytes
font_02_sfnt_off00018711.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x18711 4324 bytes