Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6e64868d9e46ea…

MALICIOUS

PDF

74.8 KB Created: 2021-03-30 00:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3de275e74b6ad98910bd2b54af2b1b37 SHA-1: de82d9e2109aaca17673d0ec6dc3c13b48d38947 SHA-256: 5f6e64868d9e46ea1a4ce99ba36cfe48f8fd8047e4ed883369d347bbc7d4d195
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or spam campaign, indicated by the 'PDF_SEO_LINK_FARM' heuristic and the presence of numerous external URLs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. Although no scripts were explicitly extracted, the PDF structure and URL farm point towards a malicious document designed for user deception.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/award?keyword=cephalometric+analysis+book+pdf
    • https://cdn.sqhk.co/teketerep/c0jd0gj/99247527618.pdf
    • https://cdn.sqhk.co/kutajanode/gcNeQje/weather_forecast_for_birmingham_tomorrow_please.pdf
    • https://cdn.sqhk.co/sugigevapure/jhgc3um/60840917635.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2cae712c-cb0d-46aa-a8c1-49f19687c95b/coolpix_p510_remote_control.pdf
    • https://uploads.strikinglycdn.com/files/361a3472-a90a-44a1-baf6-db06f624e457/vaxojeforipupinig.pdf
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_bb0fb5cd437e4a83920b3e5a97afaa14.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9538206c-00e0-4625-88f3-02002831b015/32544895418.pdf
    • https://uploads.strikinglycdn.com/files/a3d6fd6e-6676-4fe6-9b03-d0251f06f3ea/digolapusijaniler.pdf
    • https://uploads.strikinglycdn.com/files/5da6454f-cd2a-4a5f-90b5-1bfadc54a901/gone_with_the_wind_sequel_summary.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_c66d31ebb7ce4d29948d61c29cb3ebb3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1e411eb5-09ce-4d3f-ad7e-1366b890bca0/duvaremikulegoterigorif.pdf
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_ba4e1a285ae44eba9003c1778bf13c51.pdf?index=true
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_56acc51858354cf1bcf78013b03f0362.pdf?index=true
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_a981cdb2d02c4a938c530d47acc1c009.pdf?index=true
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_f30565badb4e42d9ab06969f53efca18.pdf?index=true
    • https://9dd02728-8b0e-4c16-8a5b-31b14a6ec887.filesusr.com/ugd/d8c3ed_34c5cf58d5e847e095d0bd3ac634bc1e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3e7c3f84-912c-4ff9-a53e-5c7e006b5736/92399542152.pdf
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_7160c624a2eb4ee9b511aecf7d63ec83.pdf?index=true
    • https://uploads.strikinglycdn.com/files/442ad2a9-24c7-4504-9977-785b8ff2c49d/14469779999.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef8.bin
07efd4b5ce35fe43d562a47bea6ca2be7e52a32f6dbf0d49a2a72276c44a66d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF8 3016 bytes
font_01_sfnt_off0000d9b3.bin
63b66f95598a736990a0b5b6bab59936496e1cebecb5318e04cf0eb3b1479be1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B3 5512 bytes
font_02_sfnt_off0000ec4b.bin
50c8c23cfa0837b1578a00c137a82c5d1305cb3554b5969be5f7d6f97b792e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 10220 bytes
font_03_sfnt_off00010f54.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F54 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.