Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3ecebb210f207d…

MALICIOUS

PDF

78.9 KB Created: 2021-03-24 03:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7c50e16f1c4963aa0da4385be40584cc SHA-1: 866577d8a938762a417821017acf807e34cb10e7 SHA-256: 3c3ecebb210f207d83f0494c306329c48c50fdc28ed1163c48fecb0e8d7f7c4d
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs, many of which point to disposable hosting and are indicative of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected the file as a phishing trojan. The primary function appears to be directing users to potentially malicious or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=what+is+a+good+father+quotes In PDF document text
    • https://mipigonegomef.weebly.com/uploads/1/3/0/8/130813466/kisegadujul-zunaduxafer-wepadexulik-powazoz.pdfIn PDF document text
    • http://giwosesupalu.medianewsonline.com/b_l_theraja_basic_electronics_download.pdfIn PDF document text
    • https://vuzodafolo.weebly.com/uploads/1/3/4/7/134732359/1731856.pdfIn PDF document text
    • https://zanixikowupu.weebly.com/uploads/1/3/1/4/131437740/jilavopotexabej.pdfIn PDF document text
    • https://jimekijan.weebly.com/uploads/1/3/2/8/132815057/nogab.pdfIn PDF document text
    • http://mabizevo.22web.org/wivelinezotusanekesativen.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/xezukosa.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/feb3ad2f78471.pdfIn PDF document text
    • http://rozogididibusar.sportsontheweb.net/52084355384.pdfIn PDF document text
    • http://letilemugemin.66ghz.com/waiting_for_godot_book_free.pdfIn PDF document text
    • https://rixeludabigadak.weebly.com/uploads/1/3/0/9/130969597/kaxutipogugeje-tabofixiwezoxom-xaledisesipenik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nivuzujanux.myartsonline.com/mendelian_genetics_questions_and_answers.pdfIn PDF document text
    • http://nesuvumuvugelo.epizy.com/telephone_icon_for_business_card.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/rare_caudiciform_plants_for_sale.pdfIn PDF document text
    • http://jodunobu.rf.gd/monster_girl_quest_wiki_sara.pdfIn PDF document text
    • http://xafegewiko.epizy.com/matlab_genetic_algorithm_toolbox_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/laserjet_pro_mfp_m130fw_user_guide.pdfIn PDF document text
    • http://numovid.epizy.com/gixilusekilasegajevi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 5052 bytes
SHA-256: 22bd981da881f22637ba1d6143c2ba67d5cb557b0d1bd574c2c08deb44267d7c
font_01_sfnt_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 11096 bytes
SHA-256: bab196bd8dd9c8f96d7f7744cdc5f03d6f3f1f31af5e294b1a74427d4dd4c72f
font_02_sfnt_off000120bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2