Malicious PDF — malware analysis report

Static analysis result for SHA-256 092819091cf5341b…

MALICIOUS

PDF

69.1 KB Created: 2021-01-09 17:12:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ac7af9e0def36aa533db59c2e39c7b SHA-1: d19cc1e3f59417676a7ee918f2251c201e70b84f SHA-256: 092819091cf5341bfe6ef18034feed3121cc9dbe6c568ad0e60f40df48d92866
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malicious content distribution scheme, indicated by the presence of a large number of external links, many of which point to PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests an attempt to create a link farm for SEO manipulation or to distribute malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links, including one pointing to a potentially malicious URL, indicate an intent to redirect users to other resources. The ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/aws?utm_term=assassin%2527+s+creed+revelations+apk+mirror
    • https://cdn.sqhk.co/tokarikadez/vgjIXRD/rema_tip_top_careers.pdf
    • https://cdn.sqhk.co/podidiwi/higgOhb/cross_stitch_thread_storage.pdf
    • https://cdn.sqhk.co/peluxisomex/8phdz1o/34221203879.pdf
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/roset_biwuzo_pumozas_batotejovuvo.pdf
    • https://gigewabiwijezu.weebly.com/uploads/1/3/4/5/134576475/2558276.pdf
    • https://kijilijesudopob.weebly.com/uploads/1/3/0/7/130739968/kajetuduzewog-kimaxosal.pdf
    • https://cdn.sqhk.co/zutujodara/ehhiHsw/31763669786.pdf
    • https://duwusejirut.weebly.com/uploads/1/3/4/3/134370685/cb641a029cc037.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kegubinefuda/free_acrobat_professional_2017.pdf
    • https://s3.amazonaws.com/nuruvapozixix/the_kite_runner_free_download.pdf
    • https://s3.amazonaws.com/vazisi/zilezevapokubu.pdf
    • https://s3.amazonaws.com/fekaduvopigab/33570794743.pdf
    • https://s3.amazonaws.com/loneminovu/20642654226.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_off0000beea.bin
07b86ee27fd8e2718d75f06110e5839a39e0eac3a46a0f5fa1a5fbed9bfbb185		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEA 5152 bytes
font_01_sfnt_off0000d053.bin
cde0f628e18bc2195bed3f03f66dd70a4369be14838b2ca9185ba33c6bbea5a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD053 11940 bytes
font_02_sfnt_off0000f79a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF79A 4324 bytes

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