Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc8e8c02c5e07a5…

MALICIOUS

PDF

69.0 KB Created: 2020-11-29 20:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 42a2b5a505eff227127c304aa39ead4b SHA-1: 249fe266f6fe221e6ae0d1f7d23a0309a64bb575 SHA-256: 5cc8e8c02c5e07a551eaf743384e0b3cce913ea7416c68cf55ff110bfe0afb05
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/strik?utm_term=college+acceptance+letter+generator In PDF document text
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/sajal.pdfIn PDF document text
    • https://mugafurevokez.weebly.com/uploads/1/3/4/8/134894013/7283579.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/32bff3cd-e438-4812-b6ef-e5ea8b8526ef/worksheet_on_rational_numbers_class_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/873e30b5-54f9-4c58-b797-41ce3a3af652/salina_buyers_guide_garage_sales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e41d44-562c-40ec-993f-df1696cd47d6/playstation_network_psn_code_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/fifobolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0ad8658-ad36-4a87-a7bc-e7b8a1887cf1/hp_z24i_review.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/pefagaxarini.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/23665849672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceb8663f-2e38-4c72-990a-485f124e2a39/66103830075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8653e39-7dc8-4097-8608-6b32ecaa61d4/vatotiwatojelafofifune.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/xepunoxawajewad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511cb92f-c4d6-4189-9b36-98c0f492c10e/xakilajulega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e441a13c-18fa-476d-83e4-c88966a23e92/15497932643.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_off0000d273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD273 4828 bytes
SHA-256: e7a574445911bf20b0148df296e08908d82fcfcb130da74c769123c96d415649
font_01_sfnt_off0000e2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EF 10728 bytes
SHA-256: 308c11b2614fc1c11c36cd5749c30e2a667c9077a321ddd5b8a15cf6e7abb96b

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