Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c465ed6aae53c61…

MALICIOUS

PDF

72.6 KB Created: 2021-03-29 19:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0a9288d9bcd64d4d31f170d1aabb246a SHA-1: 58ca0dd5a08e00886cdd4c8fc159e4e25d3b634f SHA-256: 2c465ed6aae53c61e7cf34055a1341120d5db878b4e4a3e8ca095cd269f01e32
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/strik?utm_term=how+do+i+get+an+ifit+activation+code PDF link annotation
    • http://bitsracing.net/78357197068hbx14.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/46172615940.pdfIn PDF document text
    • http://kapusta.pro/birthday_cake_image_app0zz8g.pdfIn PDF document text
    • http://goods-amzon.com/how_to_reset_a_delphi_xm_radioh990i.pdfIn PDF document text
    • http://mebets.xyz/where_to_buy_tv_bunny_ears_dragon_quest_11guer8.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/structured_cabling_free_download.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/switzerland_road_map.pdfIn PDF document text
    • http://toportt.online/73556419080br28b.pdfIn PDF document text
    • https://neruwutuwi.weebly.com/uploads/1/3/5/9/135960217/5f77ca1304dae84.pdfIn PDF document text
    • http://botefin.medianewsonline.com/annexure_m_form_for_passport.pdfIn PDF document text
    • http://sfhgfje5df.xyz/mivanoluresaritijoxaloxujn5hfe.pdfIn PDF document text
    • https://wiwokuvivatazu.weebly.com/uploads/1/3/4/6/134629214/gijibatafo.pdfIn PDF document text
    • http://trysoda.club/2017_ford_mustang_gt_premium_silver_for_salecum4x.pdfIn PDF document text
    • https://xufevojulan.weebly.com/uploads/1/3/1/3/131384667/754814953f3f.pdfIn PDF document text
    • http://reduslimitaly-official.site/528586401396rjvr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_c17b4a13228f4c5d93a208d614540be5.pdf?index=trueIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_1a24da7b54654b09a5217e939b626514.pdf?index=trueIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_cf4ecdd6bc7a42ae83b40bc205ebe4fc.pdf?index=trueIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_fcba9a8d1665465d81471abbb3bdbd2c.pdf?index=trueIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_d03f6fa461334db0b8e6974747cb1852.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 4996 bytes
SHA-256: 19ebe7cc3ee8f7f594176707feadf6fc57cc4003348e82b7d69ee341f1f71226
font_01_sfnt_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 11336 bytes
SHA-256: fe39b6fe044d2725f41a67d76e83a131bf4bec6c3e80dbc1732467c237e14b63

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