Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e4387524419fca…

MALICIOUS

PDF

75.5 KB Created: 2021-03-15 05:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 880ab96d96757ef9282c3b60bc3b0709 SHA-1: 8b17389fe664cd05e63fc0edc4c898d26ccc7662 SHA-256: 11e4387524419fca801df1c06d6ed29a06ce4c40d7dc134a20083311c38d814f
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. ClamAV detected this file as 'Pdf.Phishing.Trojan', and an ML classifier assigned a high probability of maliciousness. The primary attack pattern involves directing users to external, potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=1984+reading+questions+answer+key PDF link annotation
    • http://fc-aromat.ru/archetypal_literary_criticismkt4m6.pdfIn PDF document text
    • http://lessonsonline.site/8691520825j6u8d.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/wondershare_filmora_full4odj4.pdfIn PDF document text
    • http://vodoroding.info/minecraft_skins_free_to_use6feeg.pdfIn PDF document text
    • http://pycnidwzxc.info/antutu_benchmark_apk_uptodownoup45.pdfIn PDF document text
    • https://nofuxufemi.weebly.com/uploads/1/3/2/6/132681390/bewajilogami.pdfIn PDF document text
    • http://frankiearvelo.com/trx_force_pull_up_program9r79x.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/commando_behind_enemy_lines_game_downloadl5sd0.pdfIn PDF document text
    • http://euroshopme.site/conflict_in_hamletnpfve.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/ajhPZqp/vufalodagatolijumo.pdfIn PDF document text
    • https://cdn.sqhk.co/pisimebuziz/ha2UheJ/janasedur.pdfIn PDF document text
    • https://cdn.sqhk.co/zosurinipin/hhhiejf/xeveze.pdfIn PDF document text
    • https://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/ketuzobesejiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_0f683440d77140fe9b75c369ddaf76cc.pdf?index=trueIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_be03c3e10e114885b8e307597c050973.pdf?index=trueIn PDF document text
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_78dfa2c2b37a40dda1e0e841c1280b46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeff2b0c-2f89-4685-9a86-d265d31f559b/area_of_composite_shapes_practice_worksheet_1_answer_key.pdfIn PDF document text
    • https://68e1e3d4-268d-49bc-a8aa-b119cb10fea7.filesusr.com/ugd/3ceeb9_2152cb1dc19a448eb35849380dc24d46.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_1a786bf3bc324492b987f641a1fdd449.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/074c501a-a377-41ef-b064-ad42fcb4a3ab/cambridge_latin_course_unit_1_online_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a33848af-d136-49a3-bdda-11f179772edc/posudupegotozujezejava.pdfIn 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_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 5740 bytes
SHA-256: 257dbef8f2e49cece6a87246c0b7df96e3231eb114a84fa2872fd61d29b1ffc4
font_01_sfnt_off0000fc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC55 10696 bytes
SHA-256: 23e053654f448b6e31869b0a161784134deba16eb7af1d3180d4c99b6ca05ad1

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