Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0fbe2cfd024dda…

MALICIOUS

PDF

88.5 KB Created: 2021-03-23 07:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a8644be9dc268121a3a09b1085ef4e5a SHA-1: b76d4694e165aa63e5bfe1acfe287786ea2aabc4 SHA-256: 1d0fbe2cfd024dda14e768e249dd13cc56fc540ff8de3639b5fdcc7df85d9d78
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9947

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 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://xajibur.ru/strik?utm_term=crucigramas+el+pais PDF link annotation
    • http://hangookoil.ru/379267399417k3u7.pdfIn PDF document text
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/47e5239b20.pdfIn PDF document text
    • https://wivoximuvekobug.weebly.com/uploads/1/3/4/4/134473281/9fb52e735f1dd.pdfIn PDF document text
    • http://kurewegunopef.66ghz.com/activity_based_costing_system.pdfIn PDF document text
    • http://the-glow.ru/87297944303tb9v.pdfIn PDF document text
    • http://bcipreactivaperu.com/cash_flow_quadrant_in_hindidyr3e.pdfIn PDF document text
    • http://mignonette.space/32554446968eiz8a.pdfIn PDF document text
    • http://logekolumo.22web.org/nonprofit_business_continuity_plan_template.pdfIn PDF document text
    • http://lujadexezusunam.22web.org/24557184424.pdfIn PDF document text
    • http://suwudera.22web.org/27462344627.pdfIn PDF document text
    • https://sumesomorap.weebly.com/uploads/1/3/0/7/130738681/gobusimarodanedapol.pdfIn PDF document text
    • https://wenojobopowegit.weebly.com/uploads/1/3/4/8/134879608/4247295.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/aab7c629-5cc6-4617-81cc-bb11989afaf3/84535583156.pdfIn PDF document text
    • http://gisipevuzugofij.epizy.com/69831364224.pdfIn PDF document text
    • http://roruvavaderej.epizy.com/apil_guide_to_personal_injury_claims_procedure.pdfIn PDF document text
    • http://dekuxibasor.rf.gd/sujimupexobaju.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/dan_brown_robert_langdon_reading_order.pdfIn PDF document text
    • http://kirawijivovujej.epizy.com/australian_passport_application_form_for_child.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b79765-89af-43da-acd6-c29cbc4aea86/oasis_water_filtration_cooler.pdfIn PDF document text
    • http://wotiputega.epizy.com/98826750916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092d0fec-8ded-4df7-be03-b97af4b1eb3e/jewununigebideragolupe.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/aloha_pos_software_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/the_veil_was_torn_kjv.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/79170129523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abeb6f8-e711-4ace-a0b9-0e9f085ff401/les_miserables_musical_review_2019.pdfIn PDF document text
    • http://badizep.epizy.com/bikonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ab7d4a-7a1d-4b4f-9aca-7d20fd3ad833/listen_and_hear_synonyms_or_antonyms.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 5156 bytes
SHA-256: 57f4255d54bbd537e52bc91eb7a73063556b3f9847a22a25e623d3e1ce686826
font_01_sfnt_off00010ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED4 14388 bytes
SHA-256: 23b8af1dedce8f9cad3e1b3dcad3cc581d9f1ee858d7f4550d89273aa1fcd6ae
font_02_sfnt_off00013b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B99 16644 bytes
SHA-256: c8bf7173a3171413d7d95361e45cc61db13c921dcceb8cd0e00bb33c4248bfbb