Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad6c802a9adaeab…

MALICIOUS

PDF

77.1 KB Created: 2021-05-24 15:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 64a2e6d5972839b914065dee0f596b48 SHA-1: d18761ab33b6b736f186049e06b59d2bc65a9ece SHA-256: 8ad6c802a9adaeab98c728dd19cd94c96cd910a897ba8615014f95ae527f76c2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/strik?utm_term=how+to+get+free+money+in+nitro+type+no+inspect PDF link annotation
    • https://guparamoribum.weebly.com/uploads/1/3/2/7/132711937/9410077.pdfIn PDF document text
    • https://jofetagade.weebly.com/uploads/1/3/4/4/134442540/noporobemopajanupika.pdfIn PDF document text
    • https://sagisumofag.weebly.com/uploads/1/3/4/8/134882066/xamomarinerisapiben.pdfIn PDF document text
    • https://tegeluvosuvu.weebly.com/uploads/1/3/4/8/134873603/dijasevavajefelifo.pdfIn PDF document text
    • https://lolinukopo.weebly.com/uploads/1/3/4/3/134351434/zabube_zutavezakaf_magetasare_nigoduvaxub.pdfIn PDF document text
    • https://pofewapat.weebly.com/uploads/1/3/4/0/134018592/2518184.pdfIn PDF document text
    • https://sorilegumuda.weebly.com/uploads/1/3/4/8/134886674/e816ad2.pdfIn PDF document text
    • https://bofuvozera.weebly.com/uploads/1/3/5/3/135331850/dumixapikibez.pdfIn PDF document text
    • https://zamivevi.weebly.com/uploads/1/3/1/4/131437513/7bef21e3e.pdfIn PDF document text
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/tokifafudojex_xusetalofagan_mifomeguvus_xejupamuni.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/cb96d18f-a588-4a6c-bc2f-bbd36722bfaa/individual_development_plan_for_government_employees_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43baf0e9-fb80-4224-a251-4450c078777a/what_is_credit_granting_decision.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc2ba8c-fe70-462c-9548-1bf11a258beb/kenmore_600_series_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/097b3a3b-b774-4e1b-9130-802099fb5989/how_to_put_a_vinyl_sticker_on_a_car_window.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/607c90a1-dcb6-4748-a294-00f29a71d017/73592322844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6391fc2b-532f-4858-901c-cd5a9dbd3ac4/sputnik_sweetheart_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa823fc-506b-4f28-9812-2be1d19edea0/jubemexuxitugerajes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f193c6c2-d001-4d2a-9e3c-763cc2bca8bc/how_many_red_aces_are_in_a_deck_of_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a8b3f8-5a68-4d32-b3bc-a2996bf5f25a/epson_nx230_not_printing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c1475a-9f9a-489f-aeeb-7e19d7cb9e30/87960045468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3752b064-9053-4dfc-830c-52ba8e6f253f/the_essential_theatre_11th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8bfb5ec-f63e-4251-8984-09491016e0bb/boy_scouts_of_america_jobs_irving_tx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adab8938-075e-4318-8aa7-ba21e96eef6a/dikonumunozanaror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a67542-7d67-468d-8803-c8e355b67391/4976703998.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_off0000f0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CB 5248 bytes
SHA-256: a1a435b3766ce338b92b0da837d808f419df0cf845e6c2e680245454380b1c02
font_01_sfnt_off000102bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 10564 bytes
SHA-256: 993eba529714041c47df7058831fa984b377ff882c56de6c4123c5d5cfe07c9d

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