Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf1433906b84b5c…

MALICIOUS

PDF

71.2 KB Created: 2021-03-29 00:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fd39e6aae00aaa58512f65b3a246c03 SHA-1: 7a98feccf4c5e375e64af9e05df1e4619532bab2 SHA-256: fdf1433906b84b5cb8abcbfd0d61a67837149fc507d32aec74ee8c019c3bb768
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are generated to appear as SEO-friendly content, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' indicates a high volume of such links, pointing towards malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest the document is designed to lead users to malicious websites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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.
  • 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/wix?keyword=nutid+convection+oven+manual
    • https://zabomefekezene.weebly.com/uploads/1/3/0/7/130740536/pugivobetovixadazev.pdf
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/jojubega.pdf
    • http://car-test.pro/biology_practical_book_class_11_gseb23sv4.pdf
    • https://cdn.sqhk.co/vefoxewijuja/eoEvgVS/kiwejomarubivoje.pdf
    • https://vunukufe.weebly.com/uploads/1/3/4/6/134640969/miworomoxum_gozemulo_likemobasibati_matekokefuxak.pdf
    • http://shopeuro.pro/is_turning_20_a_milestone7rgn9.pdf
    • https://poxejoretojav.weebly.com/uploads/1/3/4/7/134740271/8473656.pdf
    • https://cdn.sqhk.co/vuzowadijavu/aihd1he/500_words_2021.pdf
    • https://cdn.sqhk.co/xejudawadoni/idIijqs/moto_g5_camera_app.pdf
    • https://cdn.sqhk.co/xubewarow/WyyieuE/euro_truck_simulator_2_v1_19_download_apk.pdf
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/nitofoxasofidex-boxetev-goxapuj.pdf
    • http://trafikcezaodebayisi.com/femitubazobolemolibotorororn98.pdf
    • https://cdn.sqhk.co/dasadogiso/fCUBQZj/retro_city_rampage_dx_cheat_codes_android.pdf
    • https://repowuvosifopel.weebly.com/uploads/1/3/6/0/136050091/c36140ed6ae3.pdf
    • https://xapukuzikoki.weebly.com/uploads/1/3/4/3/134381416/fasenu.pdf
    • http://deromgroup.com/9622416495611uly.pdf
    • http://pornbustyvids.com/business_project_proposal_samplejajo1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_f3f32fd881a84c95a61aed9c9e2d9131.pdf?index=true
    • http://povalimokuwov.rf.gd/adverbial_clause_of_purpose.pdf
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_c4ffb9cd3dd941d4883ffc6aa80734c1.pdf?index=true
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_d9a1ee74c23841aaafd5795d65942e84.pdf?index=true
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_37b17fdbd99545ad993636fe9ae62fec.pdf?index=true
    • http://winigoset.rf.gd/afunika_nakulalolela_video_mp4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce4f.bin
8f7fa174cf6a5ef26ec03bfc6f7869e60d8351bc31d44b53963594f76669c344		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4F 4720 bytes
font_01_sfnt_off0000de3b.bin
4bd619b0f9353c683ba05e913bc1472633393031c8100ab844972c59be26fbe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3B 10372 bytes
font_02_sfnt_off0001018d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 4324 bytes

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