Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d54a9afa0780605…

MALICIOUS

PDF

89.1 KB Created: 2021-03-08 14:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bf317f625776b44f1d9c9a9725f82c80 SHA-1: 4ef41e42ea17fdb273c5e7dba127b7d09baa74ed SHA-256: 9d54a9afa078060581d990f0f570c614784739f9b433d4f985c0cf493849e263
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • 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.
  • 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/wix?keyword=targus+ta-44hp+wireless+bluetooth+headphones PDF link annotation
    • https://cdn.sqhk.co/lebudawojafi/2hbJHf5/ancient_battle_game_hack.pdfIn PDF document text
    • http://dronextactical.xyz/856226088055gw4.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/higjY6L/recette_sandwich_poulet_canneberge.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/iTjbYpD/dozegozumijujekig.pdfIn PDF document text
    • https://pezomivagijo.weebly.com/uploads/1/3/5/3/135392772/mexikeveja_kukemen.pdfIn PDF document text
    • http://nncucuucuc.space/mewisifoloxofomadcb3id.pdfIn PDF document text
    • http://starconflict-game.ru/fotidaven8uwv.pdfIn PDF document text
    • https://xaburopufazig.weebly.com/uploads/1/3/6/0/136051881/509c5.pdfIn PDF document text
    • https://cdn.sqhk.co/siviraboriru/6zjhRii/75975313855.pdfIn PDF document text
    • https://cdn.sqhk.co/gazamara/digjfUe/rilujazunamadizezu.pdfIn PDF document text
    • http://zokazurimila.mygamesonline.org/liwopejar.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/focusrite_scarlett_6i6_2nd_gen_no_hardware_connected.pdfIn PDF document text
    • https://bubituzujolumet.weebly.com/uploads/1/3/4/6/134647672/2d4df.pdfIn PDF document text
    • http://pearhaidhr.fun/city_skylines_industry_guideqlhqc.pdfIn PDF document text
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/9681817.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/tonuvimexovuxurabovo.pdfIn PDF document text
    • http://comp-arenda.site/halloween_math_worksheets_for_5th_gradext9f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_6f38e645fe644d69bebb490facd7a87d.pdf?index=trueIn PDF document text
    • http://pupagerirawax.myartsonline.com/hansel_and_gretel_bakery_barnwell_sc.pdfIn PDF document text
    • http://feferabi.atwebpages.com/how_many_books_are_in_the_house_of_night_series_in_order.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/11709871996.pdfIn PDF document text
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_9c33d613add34b51b2a09f3bd66396ce.pdf?index=trueIn PDF document text
    • http://peledopa.myartsonline.com/64755995490.pdfIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_d06572806adc43aa8b3640349242d729.pdf?index=trueIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_c4476fcd6b4a4abfb5934d68072bb40e.pdf?index=trueIn PDF document text
    • http://dezinolabebosod.atwebpages.com/how_to_make_my_own_start_page.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_off00011acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACF 5524 bytes
SHA-256: a8a878ce48731379572702231665ded5de7b07f2ba1c938f0dc093e8845601d8
font_01_sfnt_off00012da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA6 12936 bytes
SHA-256: 72db3854bc748288605fb56eadb97d29ef27032e4299354531bb1937abad5f49