Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd69a0e1a0c8c8c…

MALICIOUS

PDF

81.7 KB Created: 2021-05-31 00:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 186f50c478d7a3127cf41438eff7b77b SHA-1: 2689ec1b71b4737c1ba303d2c5c10669d31c73a8 SHA-256: 1dd69a0e1a0c8c8caa7d545df784742d79497a2df8af4cb682eaf0b075bb1018
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content. The primary malicious URL identified is 'https://soxebez.ru/strik?utm_term=downloadable+daily+planner+2021', which is likely used to redirect users to a phishing or malware download page. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=downloadable+daily+planner+2021 PDF link annotation
    • https://melokiziw.weebly.com/uploads/1/3/4/6/134669089/mokupaxutur_sibifewibarak_zejulajotafexof_rijamego.pdfIn PDF document text
    • https://nekitunanozot.weebly.com/uploads/1/3/5/3/135346928/gonagogirevibe-xafofujewewimi.pdfIn PDF document text
    • https://popoxalisasuper.weebly.com/uploads/1/3/0/7/130775362/9f428.pdfIn PDF document text
    • https://diwapaxifok.weebly.com/uploads/1/3/4/4/134488462/ximepar-suwage-wuxinomasige-gokupuxibe.pdfIn PDF document text
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/xipipe-wobezegag-vapire-xizatafo.pdfIn PDF document text
    • https://rilodogalaru.weebly.com/uploads/1/3/4/3/134398508/a96479c45.pdfIn PDF document text
    • https://dajifavetesa.weebly.com/uploads/1/3/4/2/134234726/devaz.pdfIn PDF document text
    • https://tuzufivogov.weebly.com/uploads/1/3/7/5/137518576/gidumili-pedolut-xadasubod-madudedev.pdfIn PDF document text
    • https://pewofofuvalok.weebly.com/uploads/1/3/0/7/130775386/nodixewuvesamesap.pdfIn PDF document text
    • https://felomogolupa.weebly.com/uploads/1/3/4/3/134345494/26eeb3406.pdfIn PDF document text
    • https://favotofuti.weebly.com/uploads/1/3/1/8/131871633/51d18b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/36602fbf-c879-4e59-bb24-430a7c2cb3c2/kodokan_judo_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93b4c23-d6cc-4627-840a-21d513f29f52/sefekinadizewaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a23959-b654-42ed-8e7d-9e6424e28234/purifizarurapereniveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f722097b-8957-4336-940a-209d889454d0/juvokuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0d629c-cc1a-46a6-95cf-f75270f4e16f/salems_lot_book_club_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b961c8-b530-46ff-bad3-640fa9e38a6a/12866468455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341c6201-bebd-4409-8d06-64595236e20e/52475101722.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3416d9cc-cf89-473b-9dee-a8a353594421/81496331435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38194b4b-1055-42cd-83f4-1eb25845f11b/fewopudimoloxufulex.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_off0000f3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 5144 bytes
SHA-256: aee880900cfb1ef9856c7b6ddf9375c6881134a9cee35a6169353971817143c4
font_01_sfnt_off0001054a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054A 11220 bytes
SHA-256: 011666fe925de2e11a2483e1c4eb19432d254b6f272a09765a53750dbf16a627
font_02_sfnt_off00012b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B80 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3