Malicious PDF — malware analysis report

Static analysis result for SHA-256 52650b8b8803137a…

MALICIOUS

PDF

75.0 KB Created: 2021-02-13 05:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 44bef376e550710511d8925c2dc9f042 SHA-1: db8df2579e6bba3d264de2bf5a884a304ea4add2 SHA-256: 52650b8b8803137aba8b12cee2f477a1bbbb520ee04cd4e9ae73a9a32833e592
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://druttle.ru/123?utm_term=dynamark+523+snowblower+manual PDF link annotation
    • https://cdn.sqhk.co/zaviresodew/ivOToTG/truck_driving_jobs_in_canada_for_foreigners.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/hnW1y11/linuladexuk.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/IjfWF8S/dungeons_and_dragons_movie_1980s.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/idjjjbi/subwoofer_bass_booster_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/1WDgdjc/note-_taking_strategies_for_students_with_learning_disabilities.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/mwhdhi7/mojewegogirojasova.pdfIn PDF document text
    • https://cdn.sqhk.co/jowapezo/Otphaii/45257786003.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/aggX38U/nogexuripomized.pdfIn PDF document text
    • https://cdn.sqhk.co/feledigowud/geKY1id/motorcycle_wallpaper_for_iphone_6s.pdfIn PDF document text
    • https://cdn.sqhk.co/ratusobuda/Wpygcii/gov_job_application_form.pdfIn PDF document text
    • https://xozejobe.weebly.com/uploads/1/3/1/4/131406614/kudunuwumox.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/rulifofuwoguka.pdfIn PDF document text
    • https://kukedinuril.weebly.com/uploads/1/3/5/3/135326584/802848.pdfIn PDF document text
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/4261333.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/i8jbhjj/ludovico_einaudi_divenire_mp3_free_download.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/9529068.pdfIn PDF document text
    • https://cdn.sqhk.co/maxolavoweje/geuBhec/spectrum_tv_listings_bowling_green_ky.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56D 5648 bytes
SHA-256: 176420c9a59456b89c1da5c497b8bbf9548288274a805c52cb76a2837c1a0180
font_01_sfnt_off0000f8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B4 11216 bytes
SHA-256: 0319466b5abd9bebcc912c12961f174685cdba2546d5835d7334b993237394f1

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