Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad69cd2df8df4a6…

MALICIOUS

PDF

84.0 KB Created: 2021-04-19 00:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 652bfb94110bbdf8b177c6bf3d5bf7ca SHA-1: 75940705fa2e6c8ec9e9207261cf42603e7e39fd SHA-256: bad69cd2df8df4a66e6055701d9572b6bfeb23cee01e8cbe4d2204a857577b05
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, forming a link farm designed to redirect users to potentially malicious websites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to `yafferge.ru`, indicating a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=laws+of+power+summary In PDF document text
    • http://wulutano.mywebcommunity.org/8644976437.pdfIn PDF document text
    • http://muzomabavima.medianewsonline.com/pengertian_national_interest.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/14284047910.pdfIn PDF document text
    • http://nefupanono.mygamesonline.org/95607966910.pdfIn PDF document text
    • http://mowogaw.mypressonline.com/ludegizisokawewofopetu.pdfIn PDF document text
    • http://desokore.medianewsonline.com/relapse_prevention_plan_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_9de9660348f94c8f8a01f165b9b0f011.pdf?index=trueIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/gelajil.pdfIn PDF document text
    • http://naranosufok.atwebpages.com/sources_of_east_african_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678d9880-ff53-46f7-8563-be734423b192/50575784423.pdfIn PDF document text
    • https://6b21c484-99f8-4e97-b77a-b77c054bfe5d.filesusr.com/ugd/f139d4_9be9869bdc9f4d7b810bd9be85e3c7e7.pdf?index=trueIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_51ed7d7703a0435a9aa59277c9be19f8.pdf?index=trueIn PDF document text
    • https://be5a03d2-cb36-429a-bb4d-4773f067dd3b.filesusr.com/ugd/b46ca8_283a480660d444cd8f7dc20a476e0a16.pdf?index=trueIn PDF document text
    • https://6f12065f-c45d-410c-b048-6ec23fb2b810.filesusr.com/ugd/02ccf7_8f78a4733a7443f5a543ce42c9dfb7dd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdfcea9f-533d-4571-ae77-17b33bd28a9c/how_install_car_seat_base.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a7c4c89-669e-4045-ae1a-ec5d4bcc1dde/69085029562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8442180-271c-40c4-b63c-663749e62364/36715288348.pdfIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_cc91dd7fc09949298dd85d8fd854ac72.pdf?index=trueIn PDF document text
    • https://c2dbac7f-2075-4dc1-ad03-af0d0352bff2.filesusr.com/ugd/278743_e913e400a48b427d97d728f48c293763.pdf?index=trueIn PDF document text
    • https://ab9101c8-a046-40a0-ba79-761bab9f3367.filesusr.com/ugd/61fb7c_cbc89c2e573045aea837951b40cb7dfc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a1dee5a-f15e-4156-a270-d6b97240f2a3/kofovezugepijiwunufelo.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_00f27769170c4c649119c30ee2ad30d6.pdf?index=trueIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_22f4ba8cb00d4248b6932a748e747286.pdf?index=trueIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_ca89370bed4b425fa9cdaa29d23d3fc7.pdf?index=trueIn PDF document text
    • http://noroved.myartsonline.com/pdf_text_editor_free_windows.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_off00010c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 5152 bytes
SHA-256: d80ed3dfac1481dc5c00f37ee8b2deed41a9ee456d41c440504c583d039b4644
font_01_sfnt_off00011dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 10832 bytes
SHA-256: 4d58cfd306f7abdad86db46e060bec3e904da97fc77f5ad3cf169abf7ef673af

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