Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ec9eed1a7044e5…

MALICIOUS

PDF

67.2 KB Created: 2021-03-03 13:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6da710de312b9764628b8bcec2697bd SHA-1: 65971ac9de17c2aad51a294e567130570ccf2a8a SHA-256: 30ec9eed1a7044e5ac1aeece3ac3533ec203cbef17543653ac256fab0584c394
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to suspicious domains and are likely part of a link farm designed to host malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://botokaw.ru/123?utm_term=subject+and+object+pronouns+worksheet+pdf+6th+grade
    • http://instgrmmverifiedbadge.com/nutagavafo6igny.pdf
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/kalop.pdf
    • https://zapotaputilaka.weebly.com/uploads/1/3/2/6/132683001/bisuzubafa.pdf
    • http://circulshtangcalip.website/allegis_group_email_formatnswmn.pdf
    • https://rorobobadewa.weebly.com/uploads/1/3/1/1/131164171/tubim.pdf
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/13a64405823d.pdf
    • http://mamafiposorugul.sportsontheweb.net/xusoru.pdf
    • http://svoytrylend.xyz/734793466184e4lm.pdf
    • http://ch-bewertung-2888.xyz/lekeribqj8w.pdf
    • http://fijubigatusurov.scienceontheweb.net/nejijina.pdf
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/xidobafitipesimenasu.pdf
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/jutuk.pdf
    • https://jarubobukifali.weebly.com/uploads/1/3/5/2/135297267/domowu.pdf
    • https://nakaleraba.weebly.com/uploads/1/3/4/6/134606700/423195c426b9ad.pdf
    • https://lideteli.weebly.com/uploads/1/3/0/7/130775407/6d20581ac0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kozewuposoridil/wozedukakadawokem.pdf
    • http://jaxunukologefis.onlinewebshop.net/whats_the_difference_between_sequence_and_chronological_order.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_off0000c8ad.bin
e400cb12f3decb35b1e062ccb621c7f93fee30a1e3c851f56a339e477b04fab0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AD 6016 bytes
font_01_sfnt_off0000dd35.bin
b258ea97ef85b27c2fff863b10dc6cd517a59ac9db6274e4565d2a98ebd5b065
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD35 10000 bytes