Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc58b349b766073a…

MALICIOUS

PDF

70.4 KB Created: 2020-11-19 01:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e3735974d9e5f7d78ad2489f7f04b970 SHA-1: d46c2fd7dba0c47e4fef9634409eea4dfba95d4d SHA-256: cc58b349b766073a96e2aeb44cf33e1db7297c9e2eb3a5c5b7cfab15ba332b5c
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm, and a PDF_URI pointing to a suspicious URL. The ClamAV detection and ML classifier also flag it as malicious. The embedded URL suggests a phishing or malware distribution lure, likely related to the 'twilight sub indo' text found in the document body.

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://trafffi.ru/strik?utm_term=download+twilight+sub+indo PDF link annotation
    • https://mogawurid.weebly.com/uploads/1/3/4/0/134042680/3995498.pdfIn PDF document text
    • https://ropoxazuwaso.weebly.com/uploads/1/3/4/0/134040565/gevubuwopezariludot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421213/normal_5fb5a2e08e3da.pdfIn PDF document text
    • https://tikepewovexa.weebly.com/uploads/1/3/4/3/134317170/4787d15c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_5f962a2839db2.pdfIn PDF document text
    • https://warenumew.weebly.com/uploads/1/3/4/8/134871813/nefaweris.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/critical_care_made_incredibly_easy__free.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/nabonepagefiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cfa279e-1641-4be6-b715-75c3867aafc1/73536918138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a5815f-c0d4-48ac-8687-510d666fba76/besifamiruzopuduxef.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/6469371426.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/design_logo_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/what_is_the_climate_in_europe_like.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/reviews_of_kel_tec_pf9.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/24103124956.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/87265895344.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/flour_bluff_intermediate.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_off0000c007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC007 5224 bytes
SHA-256: 9fb159a2f4a932f32a32c6b71504a02a818ad3c772555d4d0bba706bc4ad474f
font_01_sfnt_off0000d1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E1 10396 bytes
SHA-256: 7245327a755d28e7772aea03f6763e3483d0f63bed646d2c0e1028deb10da37c
font_02_sfnt_off0000f59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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