Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4b826e2de0b0ef…

MALICIOUS

PDF

70.1 KB Created: 2020-11-23 14:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91fc6a8b6e5bbdf8b454629f1e2cacf7 SHA-1: 788217f091b71bfeacc56269f7daf8f77313606f SHA-256: ad4b826e2de0b0efd600e5fa29748cca943430feb10bfa8b1f2215311fd0374b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, suggests a lure related to a 'Recaro young sport user manual'. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=recaro+young+sport+user+manual
    • https://cdn-cms.f-static.net/uploads/4487631/normal_5faf5a22aa7b6.pdf
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fb77c600463f.pdf
    • https://cdn-cms.f-static.net/uploads/4455681/normal_5fb9a120c0242.pdf
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5fa370c715e9b.pdf
    • https://cdn-cms.f-static.net/uploads/4419827/normal_5f9767d56520b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/eab5698f-2318-469b-a10b-a14829dc7273/the_reason_i_jump_book.pdf
    • https://uploads.strikinglycdn.com/files/506ab626-1564-4c9c-b127-31babebbeb48/storybook_love_chords_and_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/4ded1d40-cc7a-4a45-bd14-d1f967692160/fabavoledonej.pdf
    • https://s3.amazonaws.com/wetevali/51521865637.pdf
    • https://uploads.strikinglycdn.com/files/7fa44474-fcbc-4648-9b35-de66d73d5698/45498291599.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d571.bin
f1fba70ff1a0f0d8471d0edd252d90966b08cfb493c7f3cbef8d35b83cb5fb90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD571 5360 bytes
font_01_sfnt_off0000e7ac.bin
1488a325472fb5c2f4d11859c89e24030a5a6e904d8a319862811c1479e1cec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AC 10456 bytes

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