Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce78b08b83f52ffa…

MALICIOUS

PDF

68.6 KB Created: 2020-11-09 23:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 478188ee6bb071e1ebe6e5115538bdc7 SHA-1: bfffb1832b03f9dbd4438ac713e6ba39205cf86c SHA-256: ce78b08b83f52ffad75ec184984abf32303e32cb3899eee90e7e04b07052c2fd
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, with one specifically directing to a known malicious redirector. The document body, though malformed, suggests a lure related to installing an app, aligning with phishing or malware distribution tactics. The presence of a link farm further indicates malicious intent to drive traffic to potentially harmful sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?keyword=how+to+install+showbox+app+on+firestick In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5fa1b557aed0e.pdfIn PDF document text
    • https://vegilirebaj.weebly.com/uploads/1/3/1/0/131070576/wozafosiza_pefalix_molevutofasenir.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/lojufizuzoziwakatu.pdfIn PDF document text
    • https://butonobafogiz.weebly.com/uploads/1/3/4/6/134607318/kataluwej.pdfIn PDF document text
    • https://jozifopavix.weebly.com/uploads/1/3/4/3/134355896/pulikavivomis.pdfIn PDF document text
    • https://menedusuwoguv.weebly.com/uploads/1/3/4/6/134699995/tixigiredadisuvi.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/77ddecd7-89bf-4d98-aeb9-4ad424f373d2/mebudedex.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/combined_scale_factor_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/47214912181.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/18108079698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51108c95-d0c6-49bd-adc1-5c7673e9a436/34091294655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/989bd53f-77ad-46b6-ba57-52a4b5121541/toxasinatumaxenasike.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/audi_a4_mmi_navigation_plus_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC18D 3072 bytes
SHA-256: 488854e372ce6f4e19a443053265c285c80652692142ea900c9f73ea6bc13a2f
font_01_sfnt_off0000cc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8D 5428 bytes
SHA-256: 730d26413cecb26d1b71a6fc265e1f6e86ca3d63f022fed65b62abfb234d2abd
font_02_sfnt_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 12064 bytes
SHA-256: 1281e11bd3b838b41eeb7f7a9ba50d2d6330eed85ea52ad943d893be2379f979

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