Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d52d96b74e452f7…

MALICIOUS

PDF

71.7 KB Created: 2020-12-16 18:51:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c10bb7760789cc137c05aff4571aa2e6 SHA-1: b51bbd85836ab6397df7bcb253081beecd31102d SHA-256: 4d52d96b74e452f71f8ac1296949e536394e1a36855a7b9f2d9d48390b68b58e
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which are designed to appear as legitimate search results for popular items. Analysis indicates that at least one of these links, 'https://traffine.ru/123?utm_term=ikea+hemnes+tv+stand+gray', redirects to known malicious infrastructure. The presence of numerous external PDF links and the ML classifier's high confidence score suggest this document is part of a link farm or phishing campaign designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=ikea+hemnes+tv+stand+gray In PDF document text
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/laziri_fosepuvowexa.pdfIn PDF document text
    • https://pefemodadiz.weebly.com/uploads/1/3/4/5/134520562/4753612.pdfIn PDF document text
    • https://joluduloj.weebly.com/uploads/1/3/4/2/134266967/ribopaze.pdfIn PDF document text
    • https://vixagukire.weebly.com/uploads/1/3/4/3/134364056/8b350970893.pdfIn PDF document text
    • https://ruwitopiramowu.weebly.com/uploads/1/3/4/3/134364975/15970f9.pdfIn PDF document text
    • https://woxejisuwu.weebly.com/uploads/1/3/4/3/134322210/77a3327ef94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zinudipir/55899437263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26c8d60e-9a88-4668-a389-8441354af270/dajiwonibuv.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/radarijawexesogonebof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b956b3-a169-436f-aafa-002df9dd2143/maus_part_1_chapter_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7cfaeb-7dc4-4497-aa20-8557d7bba504/50203530811.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/detailed_lesson_plan_in_science.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/lumitizubukipiwax.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/java_spring_tutorial_beginners.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB58 5372 bytes
SHA-256: 095c3b52d4beeee046c8105b81a43029bcf57548b376ea428180148b328a1f35
font_01_sfnt_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 10728 bytes
SHA-256: a5e48dd41cf5db990b7ee025610adde75bf2a99d49b4fd24704031cabcd273a4

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