Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c03ff5bda6f03b…

MALICIOUS

PDF

72.7 KB Created: 2020-12-11 06:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c9033d81855b038cd0fcf77df31da073 SHA-1: 1139675a8caae0aea668d67620bb48c3cb9d8e77 SHA-256: 97c03ff5bda6f03be96ce5770b425be34d70f340b97c949de8693d093b75713c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'traffnew.ru', which is likely used to deliver a malicious payload or redirect users to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'Avast free antivirus'. No scripts were extracted, but the PDF structure and embedded URI indicate a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/aws?utm_term=avast+free+antivirus+per+tablet+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f8c622d4065a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_5f8f3f954333d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475741/normal_5fbf3a6300b74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/waxegatulo/zimoraxu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29729405d5340f33472fa/t/5fc743e348d5672cfb3ba794/1606894563622/98637391062.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68be9405d5340f350cd4c/t/5fcfb4d70496d067bde09294/1607447767487/gopav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb42e2b-49bd-4451-865c-16f6591503f7/kutuzagadidik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc002e7e5c7695ca996b6a8/t/5fc10e349d79364840b2a2ba/1606487605401/69545793046.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10b4527a199023ab623ef/t/5fcf12113fa051062b3f9516/1607406101556/24786401847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b93f11a-bb8f-434b-9670-566606079183/97641379006.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6b554d2523e4b70bcdb4b/t/5fceeaf51901dd4d2ec72b50/1607396086825/debezaweluzavezololi.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/types_of_drugs_commonly_abused.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f04fb3-e504-4bc6-bd26-dbc8dde3dd6b/pakolimetejora.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF56 5108 bytes
SHA-256: aadc519a814fb046ebab787190792ea0b6dae9c6aa78696500bb88e2d8bb3580
font_01_sfnt_off0000e0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B4 11084 bytes
SHA-256: 1a62d4fb5ec91879d740272450e154aace5a108cc6278d2d3388bd545a0287ae
font_02_sfnt_off00010611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10611 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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