Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5168fd530409b3…

MALICIOUS

PDF

76.7 KB Created: 2021-03-15 08:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1be70c3028677413ca2f2e90c5bcb1ee SHA-1: b210cdcaf21a394897b957218bc864523e700e95 SHA-256: 0e5168fd530409b3fafbad4fdfd1bb9120329ce8dbac8918282e31ec1c5f6622
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to disposable domains, a technique often used for SEO manipulation or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to lead users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/wix?keyword=ccsf+spring+2020+catalog PDF link annotation
    • http://delayikapy.xyz/proposition_juxtapose_et_coordonnep91kc.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/eqg32Wb/as_you_wish_chelsea_sedoti_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/cjhhfid/flip_diving_hack_download.pdfIn PDF document text
    • http://selolaz.66ghz.com/mofiludadutotuneximefudo.pdfIn PDF document text
    • http://prequester.online/scentsicles_pine_ukg1e24.pdfIn PDF document text
    • http://apparently-home.com/dumajenixosozavinareoq0.pdfIn PDF document text
    • http://kivudutamazawan.22web.org/congressional_research_service_reports_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/besuduxikuvo/gNgjXGf/kezipeboja.pdfIn PDF document text
    • http://wildber.store/english_to_bengali_alphabet59qp8.pdfIn PDF document text
    • https://wisemidotoveto.weebly.com/uploads/1/3/4/3/134349295/7424731.pdfIn PDF document text
    • http://avbox.org/shepherd_the_flock_of_god_jw2702u.pdfIn PDF document text
    • https://cdn.sqhk.co/zegareguw/gfX8hbX/2314454095.pdfIn PDF document text
    • http://pagebake.com/telecharger_alter_ego_a2_gratuit02k4v.pdfIn PDF document text
    • https://rizogogitire.weebly.com/uploads/1/3/5/3/135323834/b62d9a7a5.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/jbzjdbc/fozinavelagonupotalosupor.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/b894b472-ad07-492a-94d3-bb5da5d2138b/catherine_ponder_affirmations_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ad9bea-332e-4c15-afbf-a38a7f4fb7e8/tuxotojelikonex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf998a1-1bb2-4728-9e25-f9d12fb20510/how_to_service_a_grandfather_clock.pdfIn PDF document text
    • http://ritofeli.epizy.com/65718718459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde21219-b2c6-49b9-89d9-4cb639c7408d/18.5_briggs_and_stratton_engine_oil_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a849f6-f90a-4704-972a-d97cab5a0d1f/29445308829.pdfIn PDF document text
    • http://wavemidafezan.rf.gd/mage_leveling_guide_classic_jokerd.pdfIn PDF document text
    • http://pedijuwugeta.rf.gd/ark_aberration_map.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_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 5360 bytes
SHA-256: f6491d5f81dff546dd6bdb848abb076d7bfde221aef65010fd48399f9d465061
font_01_sfnt_off0001005b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 10996 bytes
SHA-256: f1db9f43464e9934ddd25ef2037119711695ea6c47c32f4c4e21f49cc1c52cc9