Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9e221938ba7ba8…

MALICIOUS

PDF

80.1 KB Created: 2020-12-14 18:39:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ce7ca063e04a225f8d0220fe1710e217 SHA-1: e003b689a5029c5809ecadd8419633783ae91183 SHA-256: 7f9e221938ba7ba8a3de81793157ca2870fa48fb8a24cda06de67b2b8ec34a59
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm designed to manipulate search engine results or distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/123?utm_term=lambda+theta+alpha+foundation In PDF document text
    • https://birulivalofa.weebly.com/uploads/1/3/4/0/134013213/3982833.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/piruxubowizogoxex.pdfIn PDF document text
    • https://nepajomawowezuw.weebly.com/uploads/1/3/4/4/134462508/4c4375956c97f.pdfIn PDF document text
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/lonogugotivasaxive.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/wejalixex/54601575608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6a5881-c92d-4193-938c-b9fee623709f/58900165249.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe105f4f98375720a7f101/1606291552278/63531517465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52be709-aa31-425c-b78c-55041671825b/murrieta_public_library_volunteer.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/givozevositumawe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc158203f75b16643068770/1606506530896/17442323466.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b348e5c7695ca9a14b85/t/5fce93e680294c2e6bc9e6ee/1607373799162/santa_adventure_world_map.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27d7511f6a419848fbf13/t/5fcc11381e1a4d7de118157a/1607209272654/17164010022.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6cca5e2afa34b64aa8fbb/t/5fcc7203e43f2b00a8a06b14/1607234052486/city_racing_lite_mod_apk_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/bahubali_2_tamil_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/3981671711.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2F 2888 bytes
SHA-256: 1c3c0c8191a3b7cd1b69ecf1d690a564d6733b6ef21108f44b8192a6edd82837
font_01_sfnt_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 5088 bytes
SHA-256: 2551fcbf8cf5ddb060712a9227e19ea06ed2d00e4916b4be0c48d9545523cc90
font_02_sfnt_off0000f69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69C 11944 bytes
SHA-256: 0c2c387f471d2b9d5fc230b3ece4a5b31cebfb7a1dc957b751d58410b268fe22
font_03_sfnt_off00011dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBF 16180 bytes
SHA-256: 001f266d9038bf029de6bb828388afb598408c9a81be9c7989857c1305820e15

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