Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3a8efe8a29a818…

MALICIOUS

PDF

78.2 KB Created: 2021-04-04 08:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6381431dfdb44d5429c3dfab2d5307a8 SHA-1: 6954f65e1cf5cce902c84216568f2040bb2eecc3 SHA-256: 3d3a8efe8a29a818bbf033d40010ea2ba999e202c58da53317b73e6536549a00
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one specifically pointing to 'https://resalured.ru/strik?utm_term=sunter+tower+fan+price', suggesting a lure for potential victims. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, reinforcing the phishing or malware distribution intent. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=sunter+tower+fan+price PDF link annotation
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/8385080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_6064a7d266b1e.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/7392132266.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/18594298921.pdfIn PDF document text
    • https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/1617099.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/jagitadatetesorededub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477913/normal_6054ed9e72756.pdfIn PDF document text
    • http://tadefog.medianewsonline.com/chakra_cleansing_meditation.pdfIn PDF document text
    • https://gosasaweju.weebly.com/uploads/1/3/1/3/131384289/narewidukine-fuxuribepagug.pdfIn PDF document text
    • https://laxebuwefe.weebly.com/uploads/1/3/0/7/130775048/banibavolekiju.pdfIn PDF document text
    • https://bezofaxifi.weebly.com/uploads/1/3/1/6/131606652/2089630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446378/normal_603dd01e7f103.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/86572847039.pdfIn PDF document text
    • http://gikasabedadex.rf.gd/67336826565.pdfIn PDF document text
    • http://nesemuvalumut.rf.gd/51021844733.pdfIn PDF document text
    • http://xarejaxeb.rf.gd/vivodurejodarugonar.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/81139520593.pdfIn PDF document text
    • http://roweviwumi.epizy.com/18114022637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/513f106d-24b1-459b-949d-545151ed9969/nagisobexowowokudes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f7c2ce1-78ec-439a-b0ae-9e0d791af5de/how_to_sign_up_for_road_test_mn.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/chicco_bravo_for_2_reviews.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_off0000f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF038 4996 bytes
SHA-256: bd985c88be34a41c432084855589f42519924b15c8c271e495da65ae1a4b3b6d
font_01_sfnt_off00010159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10159 11836 bytes
SHA-256: ff5e0c0b3e1d32c1d073d7148bfc9a263bf94e55774b467b6523e15771ff3f11

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