Malicious PDF — malware analysis report

Static analysis result for SHA-256 de995bff4a924450…

MALICIOUS

PDF

41.8 KB Created: 2020-10-07 06:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4ce0a8673b8ad2faa61ad184f2c6a4e9 SHA-1: 673fe52f0d00882d0cde9a83714e102b39974908 SHA-256: de995bff4a92445021cb7adb4b078ea710ac6fff46788a5a134356031a511423
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to distribute traffic to various malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/strik?keyword=uygulamalarla+devam+eden+kesirler In PDF document text
    • http://lumigovo.wallabymommy.com/uploads/1/3/1/8/131872295/b4738bc1d4157.pdfIn PDF document text
    • http://nagalipij.atonewellness.com/uploads/1/3/2/6/132681670/javaw.pdfIn PDF document text
    • http://paxed.topnotchmanagement.com/uploads/1/3/0/9/130969077/872573.pdfIn PDF document text
    • http://jebenu.cscvt.org/uploads/1/3/0/8/130814761/morasutofapanopobo.pdfIn PDF document text
    • http://files.306partyrentals.com/uploads/1/3/1/4/131454116/6019467.pdfIn PDF document text
    • http://files.seedingreciprocity.com/uploads/1/3/1/3/131398367/1518556.pdfIn PDF document text
    • http://files.gillespiecoalmuseum.org/uploads/1/3/0/9/130968950/jejeniperirekoz.pdfIn PDF document text
    • http://files.hollywoodeasyclinic.com/uploads/1/3/1/0/131070452/fizirogenizadabupo.pdfIn PDF document text
    • https://site-1040561.mozfiles.com/files/1040561/9192071679.pdfIn PDF document text
    • https://site-1036735.mozfiles.com/files/1036735/96179143675.pdfIn PDF document text
    • https://site-1048166.mozfiles.com/files/1048166/fajimimipizukuvidupo.pdfIn PDF document text
    • https://site-1043324.mozfiles.com/files/1043324/54694308198.pdfIn PDF document text
    • https://site-1039618.mozfiles.com/files/1039618/23637089093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4944/6295/files/fofimowobas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7269/5719/files/jefafixubijabowefudepumap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4091/0759/files/gokuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5038/1724/files/fewoj.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_off0000625c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 5364 bytes
SHA-256: 8d106ed47ce47212445c978102840c5ec23c85d32a2431ba2562fdb783750100
font_01_sfnt_off00007493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 11628 bytes
SHA-256: cc23d6ffc7d676cd9e50cca83e4ef78b1e005803ffbf585f751b88df32521030

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