Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0dee17cca52ed9…

MALICIOUS

PDF

92.8 KB Created: 2021-03-10 21:14:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3d2c1041850240568a4ab0eb432cdeb1 SHA-1: 44b5bb8f6acc34239dd40e335f8ba7111fad01d6 SHA-256: fa0dee17cca52ed9421d567ac9464d6d449bcc20419ea54429b8d799677b8ed1
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 links, many of which point to disposable hosting services and appear to be part of a link farm. One of the initial links directs to a known malicious redirector, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection further support the malicious nature of this document.

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
  • 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=david+raizman+history+of+modern+design+2nd+edition.+pearson+2010 In PDF document text
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/tafamubiwipix-boloke.pdfIn PDF document text
    • https://jikanozirupeson.weebly.com/uploads/1/3/4/6/134656521/xipezasunu.pdfIn PDF document text
    • https://lizelizana.weebly.com/uploads/1/3/1/4/131409616/vabagumefini_kidireb.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/tivikofipaz_xarogutuf.pdfIn PDF document text
    • https://vetafewilede.weebly.com/uploads/1/3/1/4/131408572/befivuvenuna.pdfIn PDF document text
    • https://fivomatimib.weebly.com/uploads/1/3/1/0/131070631/nolurororuz.pdfIn PDF document text
    • http://promooffer.site/word_definition_drowsyu6qpo.pdfIn PDF document text
    • https://fokikemapusa.weebly.com/uploads/1/3/1/3/131398543/7650833.pdfIn PDF document text
    • https://teditiwos.weebly.com/uploads/1/3/2/6/132681477/dadapase.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/debixibisiki.pdfIn PDF document text
    • http://nonretloli.site/name_three_branches_of_government_and_their_dutiesq8xvs.pdfIn PDF document text
    • http://heartcenteredequestrian.com/49156946217t0c58.pdfIn PDF document text
    • https://pafazemewo.weebly.com/uploads/1/3/4/5/134517711/todejetufi-farosaw-zotugiw-mopapovonubaf.pdfIn PDF document text
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/8784090.pdfIn PDF document text
    • https://xibimitavidin.weebly.com/uploads/1/3/1/8/131871740/kowexali.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
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_4c3a4bacedba4ca1b9488ff498503599.pdf?index=trueIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_367d99856c7c41f88f8538d564cd7779.pdf?index=trueIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_b24df48e300441f4984a87b3bb4ca747.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polexebuj/l_archologie_du_savoir.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/zebubogaven.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/vojazof.pdfIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_7946367a72cb46f1952b28037cb741df.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1D 5780 bytes
SHA-256: aaa8df23502a644cfcc39336c818d7c09d9a7227125064946d32f73dd0505aa7
font_01_sfnt_off00012fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC0 11784 bytes
SHA-256: 44bd0cbe105b0c19f84cfcb4fd955aa8ed5142a42b6ade4092c2d36ce6b0c343
font_02_sfnt_off00015730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15730 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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