Malicious PDF — malware analysis report

Static analysis result for SHA-256 295763015d5dc7d7…

MALICIOUS

PDF

91.2 KB Created: 2021-05-12 01:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7ac6e2324aceb1ad614b8953e6103109 SHA-1: 535bc08c57015b6da56dd5db0ee1e3a7c011e158 SHA-256: 295763015d5dc7d706138533fd2d5284f86c4e49976fa9a259a8a20ad014f549
186 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. 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=example+of+narrative+essay+about+covid+19 PDF link annotation
    • https://wizugelavuri.weebly.com/uploads/1/3/5/3/135325487/51687daab1cbe.pdfIn PDF document text
    • https://sikezenubotimer.weebly.com/uploads/1/3/0/7/130739875/mazibupevexa-gebejijuwadogim.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/2506787.pdfIn PDF document text
    • https://nazoxuja.weebly.com/uploads/1/3/2/8/132814973/5176609.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/3iiGdJL/xomademovusiw.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/ibJ1ZJJ/73455567688.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/3729937.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/7294690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://527ed197-5826-4432-9c89-449afa9d705e.filesusr.com/ugd/65ef70_6f7b2cba52474c5b9dbe4c5a76fd5318.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_2f3d98582f20457781e884512b9dcd95.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07101b37-88b6-4593-a8e6-bed95a8e920d/where_is_the_nearest_fedex_shipping_store.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/child_support_agency_assets_and_liabilities_form.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/boruto_episode_guide_season_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d099ab0-a0de-4291-b528-3c5a87603f4e/latest_call_of_duty_modern_warfare_update.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/18590617938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b69262d-4ecb-4d32-9de7-1143a250b4f4/56157598364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf03cdc-48c8-40ed-8e7c-73f0fbc4b925/what_are_characteristics_of_impressionist_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89736eb4-5233-4df3-bdf5-1ca9d6786789/gukapumewirovef.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_off00012433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12433 5836 bytes
SHA-256: e1b6dfcdbcff699f4bcfd491eb4723c63c24e88ff18fa329facafaa1be776986
font_01_sfnt_off00013810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13810 11124 bytes
SHA-256: 12e0fb9b0f4581b78635d333dfb5695b475ced0ec066de90f7cde7f3bb261960

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