Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a5180b92a20e76…

MALICIOUS

PDF

81.5 KB Created: 2021-03-29 10:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 48294b74121c9ea92f64e5d7174743fa SHA-1: 33d26c715bc5a97f0cbb869c83f5fa4f493ed266 SHA-256: 02a5180b92a20e76e9c097471c6fbbcbc148b9e34a28c79f6f10579dc47275f6
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=the+logical+song+lyrics+supertramp PDF link annotation
    • http://legendnat.space/linasopitu3rkwe.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/5434868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_600f209d7a534.pdfIn PDF document text
    • http://bedomukuruxe.22web.org/additional_mathematics_form_4_chapter_11.pdfIn PDF document text
    • https://bifixebuwo.weebly.com/uploads/1/3/0/7/130776276/nipixaxebazu.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_602fbbbadf892.pdfIn PDF document text
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/mutefupa-setejupisa-xipenotebowu-damunaponuwosur.pdfIn PDF document text
    • https://zulufiki.weebly.com/uploads/1/3/4/6/134662959/zereponese_guzelawoje.pdfIn PDF document text
    • https://womevelem.weebly.com/uploads/1/3/2/8/132814223/xizodakil-mowomi-zunusute-zegixebovutu.pdfIn PDF document text
    • https://xogepojofaridel.weebly.com/uploads/1/3/2/7/132741214/sowofovidunokesa.pdfIn PDF document text
    • https://levibezime.weebly.com/uploads/1/3/3/9/133986639/19fe3.pdfIn PDF document text
    • https://kafomepavazepa.weebly.com/uploads/1/3/1/4/131409794/6954480.pdfIn PDF document text
    • https://sukanoxe.weebly.com/uploads/1/3/1/4/131453950/7000256.pdfIn PDF document text
    • http://zajowidased.iblogger.org/cg_karma_video_song_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487194/normal_6006d9f11fd11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ritanuwo.epizy.com/overtime_pay_dole.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_fee3cf90c7364c96a4d31390a85699ac.pdf?index=trueIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_f4e1553805614c2e880ca7a950e23552.pdf?index=trueIn PDF document text
    • http://pubopebiwofaz.epizy.com/nakajegekag.pdfIn PDF document text
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_839e496614a940d2a289e9930648cea1.pdf?index=trueIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_876a10ccf0344030a71339287b4dff2e.pdf?index=trueIn PDF document text
    • https://1b3e2d6a-0348-4772-9bb2-16e56a761455.filesusr.com/ugd/7bcf02_0239b5152eb74bcbaec31d224da190c4.pdf?index=trueIn 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_off00010003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10003 5400 bytes
SHA-256: 019f286bccd394a9602b9e7c5d45013672a4f53b2a1a6539d3f0fcfff7a1d96f
font_01_sfnt_off00011242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11242 11276 bytes
SHA-256: a7bbc585b2f810351596c83d05e2af5b56cc29471d08b94c2693cb4fdbf5468b