Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f7de9239792bde…

MALICIOUS

PDF

75.3 KB Created: 2021-04-04 20:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 14a921b3c06f2675ecd427c37f1347c1 SHA-1: 544dd68c6cd3029c5cffa602b03612601852e56f SHA-256: 82f7de9239792bdeb692b4e258a581a60565b38b57d3f7942e19597c6fa3a534
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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 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://gimoguvi.ru/123?utm_term=bernard+cornwell+war+of+the+wolf PDF link annotation
    • https://cdn.sqhk.co/mojuzizimu/eg1RVic/professional_acrylic_nail_kit_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/km2ijhl/island_king_lyrics_by_tenelle.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/gcjdjfh/thoracic_cavity_contains.pdfIn PDF document text
    • http://letekidela.iblogger.org/tubonaza.pdfIn PDF document text
    • https://cdn.sqhk.co/bikulatitaxe/pGjgxjh/samsung_security_policy_update_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/UjeE0gh/hero_of_ninja_archery_survival_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/jacifii/oscar_the_grouch_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/gjjgNjd/gasaxenononin.pdfIn PDF document text
    • https://cdn.sqhk.co/jumivosokigo/EgfYhbI/tapusumifugusigulubam.pdfIn PDF document text
    • http://lobubomevan.22web.org/how_to_reset_hampton_bay_remote.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/25a44641-e9ad-4930-863a-b76959dd35fd/plantronics_bluetooth_headphones_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2d02e3-e92a-4fd1-8072-e68b5b6c195e/what_should_i_study_to_be_a_real_estate_agent.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_93efcdc990174e75b501d15ede0eae8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuzo/mary_co_redemptrix_catholic_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/598037625.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/60155111641.pdfIn PDF document text
    • http://zaguvigijosev.epizy.com/javifalazewe.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/food_web_worksheet_8th_grade.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_5b8eeabac69e42158154b3ce8e85471b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d361aa11-af3b-4242-93ad-a874c319dfd6/solof.pdfIn PDF document text
    • http://musowafotoxipid.epizy.com/curriculum_vitae_samples_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/bixog.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_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 5072 bytes
SHA-256: 816f5cb88ff56939c4b98aaba380dc2c1bec44d3d0c508699d96ecb7ce89eeee
font_01_sfnt_off0000f921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF921 10992 bytes
SHA-256: 6c17dd749a99740d92f4e88c8207b35a6bc27ed2194ab3d6af67d7d000d5922a

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