Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36b2928bbca2422…

MALICIOUS

PDF

82.6 KB Created: 2021-03-22 03:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5151f0eb5eea5b1e55d470a4ec5ea737 SHA-1: 4431828e50922ae8d99cc66ebb2a271cdd03d39c SHA-256: f36b2928bbca242264d71215cbe5a228f3b42a51f36e53acf7650cc3e6d23e80
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains, indicating a link farm for distributing malware or phishing content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to 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://bologen.ru/award?keyword=how+to+play+chords+on+piano+for+worship+pdf
    • http://allerlo.xyz/potassium_phosphate_dibasic_safety_data_sheetjfllb.pdf
    • https://cdn.sqhk.co/wubunepan/NOvjfje/capsule_nyc_clothing.pdf
    • https://cdn-cms.f-static.net/uploads/4386621/normal_604a964b72c37.pdf
    • http://bunnygummy.ru/9670743938krljj.pdf
    • https://cdn.sqhk.co/guposidum/zhejahh/jowegisisunowagoti.pdf
    • https://cdn.sqhk.co/xumelesep/dV8jddo/rovupanutenowinupozix.pdf
    • http://pe50off.info/ladorusawesevajuj73yz7.pdf
    • http://card2card.live/lateral_epicondylitis_handoutx4zd1.pdf
    • https://cdn.sqhk.co/lawafopugu/hhwghSa/sevorewiwubigifoz.pdf
    • https://cdn-cms.f-static.net/uploads/4414153/normal_603c68b91ac3f.pdf
    • https://cdn.sqhk.co/sofizagumup/cphhdLf/babylon_bee_headlines.pdf
    • http://igcopyrightforhelps.com/251020455569kpm8.pdf
    • http://onenature.space/angular_4_form_submit_example9eiyx.pdf
    • https://cdn.sqhk.co/lekusovu/vYBuohe/best_camera_for_zoom_meetings_wirecutter.pdf
    • https://cdn.sqhk.co/xaranoraf/g0hNhhe/fox_news_live_stream_123.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_8c174add2c1f4894940b6edd26918904.pdf?index=true
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_fb7e5f0c47064490953a024b865e940d.pdf?index=true
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_062e145faedd47929ccc1cf3bf7079cc.pdf?index=true
    • https://8e0cabef-d481-4215-b437-8a5fc4e4723c.filesusr.com/ugd/f41140_a69c4ed274de46f6b593c09f43323d87.pdf?index=true
    • 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_off0000f85a.bin
f3d4e1fa1dd209c112055ec794152ea3139e83162aa3a4b91ec6c97f27563005		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 5068 bytes
font_01_sfnt_off00010994.bin
0df1901e2e2fd778d69bc142aaf56493297c8f6e860e847e26860f0c2a22d3e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10994 11036 bytes
font_02_sfnt_off00012f2e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2E 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.