Malicious PDF — malware analysis report

Static analysis result for SHA-256 f669764ecd80bd50…

MALICIOUS

PDF

79.9 KB Created: 2021-03-27 19:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 672af7a735e68547867647460a1bfefc SHA-1: c98324ad6a8e25678384730daafd66202e558af3 SHA-256: f669764ecd80bd503c6ae12dabeaf12cc2bb3eb95ab1216ba54ade99efa9c3be
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious workflow designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=shading+value+scale+worksheet PDF link annotation
    • http://chempion.coffee/dikupuxutowozinupxpz8.pdfIn PDF document text
    • https://cdn.sqhk.co/vexorikodo/eiKT22a/small_business_plan_outline_example.pdfIn PDF document text
    • https://mofasabopileb.weebly.com/uploads/1/3/4/1/134109330/9022717.pdfIn PDF document text
    • https://dukilukisa.weebly.com/uploads/1/3/1/0/131070258/9368500.pdfIn PDF document text
    • http://mmamba.ru/binding_the_strongman_free_downloadekldv.pdfIn PDF document text
    • https://cdn.sqhk.co/wusirilunoko/cKSieus/desk_calendar_template_vector.pdfIn PDF document text
    • https://tojoxuponoseb.weebly.com/uploads/1/3/5/3/135395296/fc0c0.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/2166051.pdfIn PDF document text
    • http://batut.space/sullair_185_compressor_oil_levelxexat.pdfIn PDF document text
    • http://senteber.site/harvard_cv_cover_lettere9qdv.pdfIn PDF document text
    • https://tunizobun.weebly.com/uploads/1/3/1/0/131069832/wugoraxirelefa-zokageruve.pdfIn PDF document text
    • https://cdn.sqhk.co/wogirujut/Ohiggib/ximirutam.pdfIn PDF document text
    • https://cdn.sqhk.co/bomunerafoju/dicgdgf/emoji_puzzle_game_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/fBheiif/58622620347.pdfIn PDF document text
    • https://cdn.sqhk.co/bulelovuroga/icicYha/brooklyn_ice_cream_factory_truck.pdfIn PDF document text
    • http://nudistoff.club/dirt_devil_platinum_force_carpet_cleaner_partsa4nbq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xuxidiso.epizy.com/how_to_search_a_person_by_their_picture.pdfIn PDF document text
    • http://danofawo.rf.gd/minnie_mouse_red_bow_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1af1b5-73a9-41ee-818d-f866da78812b/a_song_of_ice_and_fire_most_evil_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4787da1-97de-4c98-989a-06b0793caa83/personal_carry_on_bag_size_spirit.pdfIn PDF document text
    • http://momejawepafad.epizy.com/92661395168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c09807e-637a-46cf-821c-58986b0b1f7d/zuxemagomoxiza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F4 5404 bytes
SHA-256: 3174532e89793f2821b0aa550c12c904992820c9d551ae58044688436164f524
font_01_sfnt_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 11148 bytes
SHA-256: 68b167eaa4b88a85a63f1e9e28b4858612c850cbd9228d47f6a2c7630775cd8c
font_02_sfnt_off00012278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12278 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378