Malicious PDF — malware analysis report

Static analysis result for SHA-256 648d0272fff0e80d…

MALICIOUS

PDF

74.1 KB Created: 2021-05-07 22:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a053b0a88a079c0e41328ccf84016bd SHA-1: c93dace360fa4c72ba5d0adcbb6ce437e016b3c2 SHA-256: 648d0272fff0e80dfdfce5020084c8dc45d0e4c3ca8ea91eb8506998207fb087
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, and ClamAV detected it as Pdf.Phishing.Trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=technics+sl+d212+repair
    • https://cdn.sqhk.co/wixefawoz/gdijKxw/27810259087.pdf
    • https://cdn.sqhk.co/wifinalimow/hjQihgi/happy_wheels_download_pc_steam.pdf
    • http://kartaidatodemeleri.com/minecraft_banner_template_v3q7zcw.pdf
    • https://cdn.sqhk.co/kitaparek/jfg90jc/85767157443.pdf
    • https://cdn.sqhk.co/nunewole/bhflQzM/39536092421.pdf
    • https://cdn.sqhk.co/veleviziwew/BsthbD0/dictionary_online_english_to_urdu.pdf
    • http://buvogibe.22web.org/63784976412.pdf
    • http://pay-order.info/how_do_i_factory_reset_my_iphone_6_plus_without_itunesdfspg.pdf
    • http://eeuuurrrrr.space/54491705964ttgq3.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://greatholl.com/pauline_oliveros_deep_listening_book14utw.pdf
    • http://espacecmb.xyz/nesivosobw796q.pdf
    • http://trenketo.buzz/zijafewipavaviwapudemojawcjm5p.pdf
    • http://tophomework.space/android_bootloader_interface_driver_windows_10qomrz.pdf
    • http://bellissimo.online/panasonic_phone_answering_machine_number_of_ringsdmfid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/geradi/nejevuzexezukesesesozero.pdf
    • https://s3.amazonaws.com/tirimofufemukat/29809343840.pdf
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_4109e54336c846d090718b84b9d3c261.pdf?index=true
    • http://nesemuvalumut.rf.gd/amiri_baraka_books.pdf
    • https://s3.amazonaws.com/jozetej/tobibevuz.pdf
    • https://s3.amazonaws.com/dikobepibelun/hamlet_1996_movie_free_download.pdf
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_8301e650d9374647804d2ad2f348a26c.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d638.bin
5f5a8f4a5128b193af2015c2538f30548d7be65425ada9ccb7da815f2204a12f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD638 4892 bytes
font_01_sfnt_off0000e6bc.bin
7813eabc7b74387b50a94c493cef29c8ccfa37fff007688c71c9023f4236e974		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BC 10752 bytes
font_02_sfnt_off00010b5b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5B 4324 bytes

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