Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe9a048ac348012…

MALICIOUS

PDF

79.6 KB Created: 2021-01-04 19:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3e48a2632dd8166f7fe42b200e7727da SHA-1: 98fc44571358e6b03aaee6f75e4b61eb81d85a33 SHA-256: cbe9a048ac3480123522177240e7ced635d6a5a7286ba10e56961b21e0dfccf3
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious sites, such as the one at 'https://traffset.ru/aws?utm_term=discounted+cash+flow+spreadsheet+excel'. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicate malicious intent, likely to trick users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/aws?utm_term=discounted+cash+flow+spreadsheet+excel PDF link annotation
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://kiwosetivugo.weebly.com/uploads/1/3/0/8/130874254/nutefavaju.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/KjdKpif/go_planet_enschede_vlooienmarkt.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/juwesabefef-wumotexujufosef-fadukodipu.pdfIn PDF document text
    • https://fekizozawar.weebly.com/uploads/1/3/4/3/134338272/dotegedazunotujatime.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/2867f848-87cf-41d7-a4b6-d71d73602d28/www.gohealth.com_admin_america.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238b4af1-b07f-42cc-b0fa-e2dbf2784300/20517165933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce53c2bf-b771-417b-92fb-4c9048f01f23/winslow_township_camden_county_nj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f25aa9b-e4df-4906-9941-0291714a727c/2019_kia_sportage_product_reference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b10d7a4a-2fbb-41c1-a52e-eb227742dda5/tovewegesugutisaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495c0f10-f8ee-4ceb-81d1-d397f7ba22f3/firusidenadafelek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728bd362-7653-4faf-90b2-2103e4d1e2d9/70087030296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688b4ac2-6f21-420a-b56e-f701ccd2c377/uf_academic_calendar_2014_2015.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 5400 bytes
SHA-256: a101e14b0aa49d4468ec11a1adb92b33074b6b2e2da0f32c49f662be8fc18194
font_01_sfnt_off00010c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 11052 bytes
SHA-256: 0bc35e7dbe30363187c1ccd98184dab34f76480ba555b2a63efa2bfe5e21521c

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