Malicious PDF — malware analysis report

Static analysis result for SHA-256 082b9cf9375beaec…

MALICIOUS

PDF

72.5 KB Created: 2021-03-07 21:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a96a8a0b3b7cabe185456464c82188d9 SHA-1: f2b12b9f2c4fde2665c076ad139f1d46e8f751fb SHA-256: 082b9cf9375beaec239d8aacb2b883e3e64d1dc62696cdcf85f2c95722b3f3e2
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of a ML classifier flagging it as malicious and ClamAV detecting it as Pdf.Phishing.Trojan strongly suggests malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jottigo.ru/wb?keyword=sharepoint%20online%20workflow%202013%20end%20of%20life PDF link annotation
    • http://filfex.ru/g_shock_mudmaster_gg_1000_reviewtkoll.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/bugenonepekulul.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/jarupegilapuro.pdfIn PDF document text
    • http://gramnews.xyz/mapazamaxa5qong.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad851fc-5960-4f6e-b864-81ad2a6d9ba3/m_audio_keystation_88_mkii_-_88_key_usb_midi_keyboard_controller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec07519c-dc2f-4d19-9721-6cad3f68c087/is_a_2002_nissan_frontier_reliable.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/lemefurewewadufajubexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a42eaea5-05af-4387-9619-6661b2a253ed/how_to_turn_off_wii_u_gamepad_without_turning_off_console.pdfIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/6990242640.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/beps_action_plan_1_final_report.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/magazine_contents_page_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1a7919-18b5-4c2d-934e-3e107262ff24/willy_wonka_and_the_chocolate_factory_opening_scene_1971.pdfIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_f92402e1c66a449aaa3ced0db31c1a4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/1994_honda_accord_lx_fuel_pump_replacement.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_f5343b9329ec4b2a8bd02eb0d8889c8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legenapi/episode_choose_your_story_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/flu_vaccine_administration_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/063a3050-c897-4e42-a1ff-fd8f9fcc46a2/39669158256.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_off0000dd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD07 5700 bytes
SHA-256: 4bc923bc10bfff8a890723df8564d949d4c38534005b97d622bb302c39498fde
font_01_sfnt_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 10624 bytes
SHA-256: d4b7fd6facfff67629f0bd10a6250b184db8a2b4cf60063a294bf90ab02b12a4

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