Malicious PDF — malware analysis report

Static analysis result for SHA-256 031c94b3ceb79691…

MALICIOUS

PDF

75.6 KB Created: 2021-06-11 14:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56afe577600b6876dc0a3d3d18ca2ba8 SHA-1: d4d0fc2018c5d7e7c76118d596e1918e1d1bec1b SHA-256: 031c94b3ceb79691e91f1066ab5209640892280e43f34a91f539c94868a5a0ec
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing. No scripts were extracted, but the presence of numerous external URLs points towards the document's primary function of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nomylo.ru/pbw?utm_term=achyutam+achyutam+keshavam+krishna+damodaram
    • https://bajarewejewud.weebly.com/uploads/1/3/4/6/134673735/4409264.pdf
    • https://static.s123-cdn-static.com/uploads/4488102/normal_5ff78cb94df0a.pdf
    • https://static.s123-cdn-static.com/uploads/4368997/normal_5fc770975d293.pdf
    • https://xuwudavalibabiv.weebly.com/uploads/1/3/4/3/134321130/nevoxakederoxuv.pdf
    • https://cdn-cms.f-static.net/uploads/4479441/normal_5fda7290c9d0e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://tisowowuduwe.pbworks.com/f/24564087838.pdf
    • https://uploads.strikinglycdn.com/files/4ce712ec-0341-41d5-97ed-bad93b016b89/pirabopifovebolafudizoze.pdf
    • https://uploads.strikinglycdn.com/files/f7a506b9-ff4b-417d-8d78-696ca3e85721/graal_online_era_hack_apk.pdf
    • https://uploads.strikinglycdn.com/files/fe2e331f-fd1c-4ad1-8dc3-b8a0ac35a1f3/70944615294.pdf
    • https://uploads.strikinglycdn.com/files/9f5cc4f9-8deb-49e9-824d-c1b6d978f28f/84531573628.pdf
    • https://uploads.strikinglycdn.com/files/83880d8a-8c9d-4da0-b3b5-e7bbca1a260d/powermate_3500_generator_review.pdf
    • http://nibenaxibot.pbworks.com/w/file/fetch/144889155/115522009.pdf
    • http://niluputevi.pbworks.com/w/file/fetch/144792093/20768491278.pdf
    • http://wuxikadafi.pbworks.com/w/file/fetch/144597882/stoichiometry_practice_4_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/9823a61c-133b-4949-9f07-b43bb1bf45d5/kurojuzasefirufozu.pdf
    • https://uploads.strikinglycdn.com/files/50534e3f-3302-4940-a2cb-3239d6f4ce0c/16453638140.pdf
    • http://jebusolole.pbworks.com/f/4632838292.pdf
    • http://mefijunov.pbworks.com/f/fifty_shades_darker_watch_online_for_free.pdf
    • https://uploads.strikinglycdn.com/files/13d12a88-1c42-43bd-84aa-5c879d383c4d/yard_machine_riding_lawn_mower_for_sale.pdf
    • http://tarogifere.pbworks.com/w/file/fetch/144524553/medidas_dela_cancha_de_basquetbol_wikipedia.pdf
    • https://uploads.strikinglycdn.com/files/3e78c2c7-5d05-4fb4-b4c8-40cf74c8105f/the_endless_meal_salmon.pdf
    • http://lakebimutep.pbworks.com/f/harry_potter_and_the_cursed_child_film_adaptation.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfa9.bin
ecec944a16b529495aa38c048417ea07a97298b19593a2e051eda70ead66e9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA9 5244 bytes
font_01_sfnt_off0000e15a.bin
d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE15A 3720 bytes
font_02_sfnt_off0000ecbe.bin
8faead8a9dedbb32c79d41c54c2913fffc33d05a36c6a4e155af772a93fa5d52		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 11196 bytes
font_03_sfnt_off00011229.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11229 4324 bytes

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