Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb668ddef5511f07…

MALICIOUS

PDF

65.3 KB Created: 2020-11-18 00:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 81c0e111a10c33f126419ac603676386 SHA-1: 5a26e799d64c3f24649e289e2ae6daff5890e954 SHA-256: fb668ddef5511f078a89853a47e08b486b281ea6d92ca1be2ed6bc7d1c65d419
164 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/strik?utm_term=pokemon+x+y+for+gba+cheats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5fae939fd84e1.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/66e6c690b19c4d2.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/8568023.pdfIn PDF document text
    • https://fijudemi.weebly.com/uploads/1/3/4/4/134400988/lokodamatusenaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8e360c310ef.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/regagu.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/08dc9f3d-6d98-438b-bf5b-0246453a6bf7/zowiwatifebodugexozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47db72fa-03b1-4488-830d-8ac26a8d8734/vonizenenuxovinuxulalak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a2e497-11a9-43c8-b679-006027e58882/serukezilakumukux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4eea2f3-39d7-42f1-8a43-335fcca07112/19160002260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66f7a128-61ab-493d-b5e9-026ba816506b/ls1_2_bar_map_sensor.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_off0000c0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E3 5640 bytes
SHA-256: 2b3109a915e629f320e344437b24355a34b7d1fbeb9e5e3174820530c3dd721c
font_01_sfnt_off0000d407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD407 11264 bytes
SHA-256: a5572483ec473f57e59eb9ad0a2ce2ec33c0e4fe1b738d4001110f5625cf89f7

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