Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a6cbdb3cfc4503…

MALICIOUS

PDF

93.0 KB Created: 2020-11-25 22:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 30e5ce7340b8529f9aeb93c8d7b77b01 SHA-1: 8ba362c55df8671fe3c3bb7c8005ebd212053687 SHA-256: 32a6cbdb3cfc4503e20f8b1de4a140054ca080f69bcaa1a4bb0d106548aa5af7
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links, with at least one identified as a known malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm, suggesting an attempt to lure users to malicious sites. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

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://traffmen.ru/strik?utm_term=pitch+anything+pdf+chapter+2 In PDF document text
    • https://tanifovekula.weebly.com/uploads/1/3/1/3/131379991/0bfe0046443c71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/343cab88-ddcb-410b-b9d9-b469dd022a6f/41300697822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc22199-c41d-486d-86dd-0dbd4ade0ab9/sunstone_volume_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f183542a-7035-49f7-957a-9ed6b741d188/netgear_wndr3700_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/fagijaparovino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f4be63-d6ae-4c94-b35f-f5b662dac1ec/47161092218.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/apache_cordova_visual_studio_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/tewaposutigi.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/raspberry_pi_2_asterisk_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/domesatisedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92444328-2b2d-4de1-a9fe-77113161f12d/toefl_writing_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/70614513413.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/death_of_a_salesman_summary_act_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/unblocked_cookie_clicker_google_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/nulidiw.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/btools_script_roblox_pastebin.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_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 5444 bytes
SHA-256: adffc0eb3ce6205c45cc57aa9e28876ca4e8ed21d0a3d51e2dbea9d9926e56ec
font_01_sfnt_off000119d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D3 5020 bytes
SHA-256: ca6496dc7c7a08cd24eddf806094fc82adcc81a3842c52285a29f04efb1f5674
font_02_sfnt_off00012bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC0 10760 bytes
SHA-256: 908208ca3ff94a6cf71fe54860902613ae809d156ecb874ed7b4e936f1eb0258
font_03_sfnt_off000150e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E4 16344 bytes
SHA-256: 3745d395dffe053ce12bb6e6d543a89fda750690c61e1e786fb35984b58e44e5

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