Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f917194deb276cb…

MALICIOUS

PDF

91.8 KB Created: 2021-05-25 04:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 349a5b220fc64b1c57d2c04c8c7b156a SHA-1: 45fadf4e2caed0fd5302512df6f84804eda7f605 SHA-256: 2f917194deb276cb49b4106c2145ac84f2a35b5762d323f9de4275671514fd99
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a URL with 'physics+formula+pdf+download+in+hindi' in the query parameter indicates a lure to disguise the malicious intent. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://maypoin.ru/strik?utm_term=physics+formula+pdf+download+in+hindi PDF link annotation
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/joxogogerudi.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/9142700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_6051979a75035.pdfIn PDF document text
    • https://lixijuzi.weebly.com/uploads/1/3/4/6/134626773/senan.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/juxomi-nedetazijitid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_60623feeb80cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5ff64b436f444.pdfIn PDF document text
    • https://ladolijid.weebly.com/uploads/1/3/2/8/132816107/7945245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366659/normal_5feb33d4d9c26.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/xosoxafa.pdfIn PDF document text
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/lawojegaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_6038058351139.pdfIn PDF document text
    • https://sedovabopidixo.weebly.com/uploads/1/3/0/8/130813108/xitukotogija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476445/normal_603e40d7eb0b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/bokofapig/what_are_the_differences_between_fitbit_charge_3_and_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74bb01d8-f182-4780-bebf-e4a0cdca56ee/yamaha_rx-v463_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea26b0b8-9c51-4869-8d9c-83250a79cf41/how_to_start_the_first_shall_be_last_rdr2.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/what_is_mechanical_engineering_in_simple_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25dd871-223f-47ff-b1c6-9ae9a17bf8e8/75412273346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/093241b0-a372-4089-b808-45c1a54f5e47/devasisabotiwek.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 5500 bytes
SHA-256: 36caafcf8b73a59fd831afc9ff20a0964c886c9ed5c0115f7b0a557d83022aa7
font_01_sfnt_off0001060f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060F 5592 bytes
SHA-256: 8f11bbcec4fb897756bc87f3117c61f3f63ed93c923fcd7401f2e53326d35ffd
font_02_sfnt_off000118f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F9 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off00012187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12187 11776 bytes
SHA-256: eef145a1678c4d6105e95b8eab97641563b85b5ad0b99bd3e05242288ce165d4
font_04_sfnt_off00014988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14988 5812 bytes
SHA-256: c7df0d43abe7d772f490dc01bd3d6480a24e38808c71b6419b61dfa3407e642f

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