Malicious PDF — malware analysis report

Static analysis result for SHA-256 a14714e8b7eb037f…

MALICIOUS

PDF

76.4 KB Created: 2021-06-09 13:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e15a6af2e1adba804a2c6d313ac73e0 SHA-1: 6eb734585ba9cd0f0817eab725f03ab17006013d SHA-256: a14714e8b7eb037ff9454f17ace1d1c92c92944513f1062deb4c5c4f43551bb9
164 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The presence of numerous external links, including one pointing to 'archism.ru' with a query related to downloading software, suggests an attempt to redirect users to malicious sites. The ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/pbw?utm_term=the+sims+4+download+mod+apk
    • https://pefekebemapufug.weebly.com/uploads/1/3/4/3/134370705/9211842.pdf
    • https://cdn-cms.f-static.net/uploads/4390995/normal_600b54f3814e2.pdf
    • https://pamuvomamutafa.weebly.com/uploads/1/3/4/3/134305197/9205660.pdf
    • https://resibifusonuj.weebly.com/uploads/1/3/4/8/134878176/renokulituti.pdf
    • https://rezisepadas.weebly.com/uploads/1/3/4/2/134235668/9288877.pdf
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/garixa_subezowawukutiw.pdf
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5fe035896585d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ce98ca00-51ae-488e-ad34-b971a3d02160/best_smart_bracelet_2020.pdf
    • https://uploads.strikinglycdn.com/files/5c3ecb8c-6e50-408a-9cb6-11a11c9b4a48/maze_runner_the_death_cure_movie_download_in_hindi_720p.pdf
    • http://zufiwuz.pbworks.com/f/64631566105.pdf
    • http://fagimox.pbworks.com/f/ethiopian_old_music_collection_mp3_free_download.pdf
    • http://ravaxes.pbworks.com/f/98715108851.pdf
    • http://vadibun.pbworks.com/w/file/fetch/144698973/xejaj.pdf
    • https://uploads.strikinglycdn.com/files/1c32368c-f451-48e6-b275-15ddcfbfdea0/verbal_reasoning_test_examples.pdf
    • https://uploads.strikinglycdn.com/files/93ed933e-96aa-43ef-9100-81276d21dcae/joseph_campbell_foundation.pdf
    • http://buzivevej.pbworks.com/f/39946386449.pdf
    • https://uploads.strikinglycdn.com/files/4ebc3b0f-dcd0-4db9-bf5f-6fa60139ad83/complex_number_division_worksheet_with_answers.pdf
    • http://vimaxojejo.pbworks.com/w/file/fetch/144891531/49348819764.pdf
    • https://uploads.strikinglycdn.com/files/2370afaf-4cc1-4320-9acc-df91d0c11d9f/blood_type_b_diet_food_list_to_lose_weight.pdf
    • http://xobapotowi.pbworks.com/f/89395544686.pdf
    • https://uploads.strikinglycdn.com/files/fc0e3151-3e58-490a-bc0c-1e4d28e20abb/before_the_storm_christie_golden.pdf
    • https://uploads.strikinglycdn.com/files/b39cabe9-660c-4ddf-8549-1d4fe8efb2db/abnet_amharic_keyboard_software_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece8.bin
f38968e6d290f1c1988f71dd4ad7ae4281339b991506ead2bf72e88347b994b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 5296 bytes
font_01_sfnt_off0000fedb.bin
8543e2c11c7723423b07eef02c592405a78904424080b91425193d0f0fdbeba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDB 11008 bytes

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