Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1ce5b2ea4c0068…

MALICIOUS

PDF

81.0 KB Created: 2021-03-25 06:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0e2f0d2c8e2fdd1c0dbea7f736cacbb7 SHA-1: b2b42f382668588e1a657712c41c330a873fad06 SHA-256: 6f1ce5b2ea4c00683855cc058e955c32ea108cd410fe8569da3edf8c8bc2bc07
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The primary malicious URL identified is fokemale.ru, which is likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=arderas+en+la+tormenta+pdf+descargar PDF link annotation
    • https://gevanodapo.weebly.com/uploads/1/3/4/8/134887816/tupugubifuvexam-kudagalezutu-xewunulimonagaj.pdfIn PDF document text
    • https://menanolunum.weebly.com/uploads/1/3/4/7/134754058/007abaa94c7.pdfIn PDF document text
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/vowebiniwu.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/8743200.pdfIn PDF document text
    • https://muwegegedagus.weebly.com/uploads/1/3/0/7/130738526/1259907.pdfIn PDF document text
    • https://radugimexeb.weebly.com/uploads/1/3/4/8/134880062/d113b525a.pdfIn PDF document text
    • https://noxomawap.weebly.com/uploads/1/3/5/9/135981563/1eb89.pdfIn PDF document text
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/wiwafizik_zawitofo_nanuluguko_genuvi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_7dee1279b50b45de950075a21596d76e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69543be-312d-420f-84e8-bd6749649afb/5135483938.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_601ed6b21bb0422da432907e906520e7.pdf?index=trueIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_b422393ddc7c40babadef540cdaac53d.pdf?index=trueIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_597f81a7d9bf406ea8350fcabda1dca1.pdf?index=trueIn PDF document text
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_224aa55eb2fa4a8e9315783b9b8008eb.pdf?index=trueIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_293af301a9e6467e9c1fa6d4e5192183.pdf?index=trueIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_c96abeafd8614f4499df0b9a8bc0faa3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ba1e51-0851-42f7-aa1a-380ad49ad2ad/97122265603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9988ed5a-0568-4f9a-8d04-ce11d474fff6/ruluwupodezekapururaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73dca4e1-4ef5-4c22-bbfd-0b1488248993/puvufisijelozomefegiwoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438d8370-22bf-466a-aeb3-ef523a0b1b3a/pefomelurovoduge.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_9c8584a66de34872a98e31fcdd4fd442.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_e9aecf2a2ede4b86850deba3cba6534e.pdf?index=trueIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_0b3131a3ca9b4210bb735e0fd3f292db.pdf?index=trueIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_c06714bec8f04154a4f453c64421b076.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_b846ddc6f1eb4fb5a5d1f3b1e7ef4302.pdf?index=trueIn 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_off0000f952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF952 5464 bytes
SHA-256: 199c6b8cd326765e4bb40b5e4180e2b4ec4060fc8862f46e13b39889a220c0a0
font_01_sfnt_off00010bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD2 12788 bytes
SHA-256: bf58a60d7a9aabf553241d2cce403f13734f6ddab646b2318bbec41a365d8d10

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