Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8ea2e150db29a6…

MALICIOUS

PDF

71.5 KB Created: 2021-02-25 16:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2f28fe6216e77a27f07a80f10d0e2aa5 SHA-1: 3479666e8cba064e34eb0c65106900f84d67b2b1 SHA-256: fa8ea2e150db29a642a3ea03d1eef91dd4c58fc44936612a08691f2daa3ff18a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The primary external URI, 'https://maypoin.ru/aws?utm_term=do+hiit+after+weight+training', is likely used to lure victims to a malicious site. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/aws?utm_term=do+hiit+after+weight+training PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4384036/normal_5ff505b9a0f6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366961/normal_5fcb49f3276da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458137/normal_5fc878a01f63f.pdfIn PDF document text
    • http://crawlmqyu.space/amperemeter_op_acculadernbgw0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368953/normal_5fdd11e9e2314.pdfIn PDF document text
    • https://minoximamus.weebly.com/uploads/1/3/1/4/131437876/rilazalax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493602/normal_5ffb96cf0f303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480412/normal_5fdb94a1115b5.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/ab8ce00a9e375c.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/mojiwinis.pdfIn PDF document text
    • https://demijogukif.weebly.com/uploads/1/3/1/3/131382539/muwitunelo_sufexofovivevuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bolopanezodubun.rf.gd/albay_park_and_wildlife_information.pdfIn PDF document text
    • http://pugavidugipiton.rf.gd/55777818633.pdfIn PDF document text
    • http://fuxufotab.epizy.com/the_guardian_university_guide_2019_chemical_engineering.pdfIn PDF document text
    • http://wanezezigemos.rf.gd/monthly_expense_sheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/how_to_get_knot_out_of_necklace_chain.pdfIn PDF document text
    • http://mokupemoraworal.epizy.com/12344782857.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_off0000db2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2A 4912 bytes
SHA-256: ae48f7a3c91dd747f4888db11b0724b0937d1ba1c334a15f2a29fb59a4c273d8
font_01_sfnt_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 10848 bytes
SHA-256: 3afeb95f1bc61527029bddb32bdf53f21db11f0bae8e8b69f114b25b85ee9ccb

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