Malicious PDF — malware analysis report

Static analysis result for SHA-256 1babc0f9645bf254…

MALICIOUS

PDF

80.8 KB Created: 2021-05-05 12:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7c82f7bf54cb73e9e2f86040af13a18d SHA-1: 283aa8e30c00cdc3d851062d5733f234ab54af38 SHA-256: 1babc0f9645bf254e8bf3e7548ca823fa99ff732188377ec171d6348c6a742a2
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The 'SE_CLICKFIX' heuristic suggests social engineering tactics designed to prompt user interaction, likely leading to the execution of further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • 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://crophysi.ru/strik?utm_term=dell+e6410+battery+reset In PDF document text
    • https://tixuxajus.weebly.com/uploads/1/3/2/6/132682254/gewofo-fawuwesagujeg-bokegizuzex.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/srimad_bhagavatam_canto_11_download.pdfIn PDF document text
    • http://vugaganopofom.mypressonline.com/98037440629.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/gj2Ygc6/vewajewa.pdfIn PDF document text
    • https://vimumigejanamim.weebly.com/uploads/1/3/4/6/134619591/98956630a4.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/eWZgila/62750020871.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/xpgh9lP/understanding_evolution_the_arthropod_story_answers.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/mecanismo_de_accin_de_los_aines.pdfIn PDF document text
    • https://cdn.sqhk.co/simumufij/ijgjg59/technical_support_skills.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/b8ad64ef-9397-4056-bd92-46a9c7cc9386/77641206149.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/free_figure_drawing_books.pdfIn PDF document text
    • http://sijaxulo.rf.gd/julitibasijafep.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_08fba35252da48ee9686ff5f220546c4.pdf?index=trueIn PDF document text
    • http://putojeferef.rf.gd/simple_arabic_mehndi_design_images_free.pdfIn PDF document text
    • http://mixonanax.epizy.com/guide_book_of_class_9_science.pdfIn PDF document text
    • https://2cc935b2-b854-4d3d-8499-e3bac5ec7384.filesusr.com/ugd/2e82fc_7625868b2a0243b2a8ac1b4c68a02c42.pdf?index=trueIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_eb0e4a2d98754725b1d28bfb1aa06312.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/819cafd7-6520-4b85-a4d2-352a7a9c7bbb/farberware_toaster_oven_rotisserie_chicken_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6432956e-eb92-445b-83e9-35fbf9b8eae0/71022866520.pdfIn PDF document text
    • https://17c3d818-7f64-4152-976a-2fa997d7a7be.filesusr.com/ugd/e2c250_483e365262674fd7bba7079beec1f09c.pdf?index=trueIn 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_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 5356 bytes
SHA-256: aee66bddedd956969864e027680461d2c47c7a446a5e710821e5c7a31907b56d
font_01_sfnt_off00010e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E14 11380 bytes
SHA-256: b2208c538600e5c6fd91ef972f6a577c9ec5c84192e8d896e72d276ad122614f