Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fa39e125ffccc0…

MALICIOUS

PDF

76.5 KB Created: 2021-01-07 21:06:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a5656b502d0924cfba2640859b9ca54d SHA-1: 7a70007f0d1bca243bc49a467a14cb83897a3d4b SHA-256: d1fa39e125ffccc078bb557652343060466e2826284fa3564b640263b6041d63
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely used to redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'inbound marketing agency annual report'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=inbound+marketing+agency+annual+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5fe7da4bed8cf.pdfIn PDF document text
    • https://liwojugimigazip.weebly.com/uploads/1/3/4/9/134904469/zafijekaramuju-wasuxesi-zepilo-vefufojejosoka.pdfIn PDF document text
    • https://cdn.sqhk.co/waxipefimafa/ORifrge/baby_shark_dance_world_record.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fa4e5fae75de.pdfIn PDF document text
    • https://tozabofosizo.weebly.com/uploads/1/3/5/3/135340530/nuzenatisijubi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_5feb4fdc7dd9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461744/normal_5fb914395e358.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/iagiAqB/fuzerutubibonajamovarudej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f309927f-6447-4a3f-9c64-c13def641352/whatcha_wearin_full_movie_eng_sub_do.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/duxaxezogoje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14bdd3c2-d082-40ae-8784-96d7f797d4b0/naughty_boy_zayn_and_louis.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/naxeneruxav.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/dofomotuwuxok.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 5456 bytes
SHA-256: fddd5908df5de9eb0841c0ccbb86a7373b2a11c0a7c918a838436f07c3c9cbc4
font_01_sfnt_off00010091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 10696 bytes
SHA-256: 737ee77fdf7af79350829b9f99f18c1c1a0d2a18f6babacf0bacf4e6fab2c4ea