Malicious PDF — malware analysis report

Static analysis result for SHA-256 090e15b9c98f5ca9…

MALICIOUS

PDF

75.3 KB Created: 2021-03-27 15:03:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0216e203110a701dad0691156092d1f9 SHA-1: 726b2af75224546607da8a6a171784c9ff408121 SHA-256: 090e15b9c98f5ca9659481adf27f3d92955b85cd5c397502a334e0621995c3e5
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains text related to "cheerleading tryouts flyer template", likely a lure to entice users to click on the embedded URLs. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious sites.

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://ponafet.ru/123?utm_term=cheerleading+tryouts+flyer+template PDF link annotation
    • https://gikejujeg.weebly.com/uploads/1/3/5/9/135966421/2a973676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_6044cba9d7bba.pdfIn PDF document text
    • http://roserubusigiwij.mywebcommunity.org/buteogallus_meridionalis.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/3419366.pdfIn PDF document text
    • https://buporinedo.weebly.com/uploads/1/3/4/0/134041533/5177798.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/SgdkLU6/kiss_of_war_frontline_of_hell_tipps.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/iigenJu/ghost_riders_in_the_sky_lyrics_meaning.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/44326590254.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwifemi/dfgeEib/roblox_studio_online_course.pdfIn PDF document text
    • https://zogabugopevaluz.weebly.com/uploads/1/3/0/8/130814784/d365e.pdfIn PDF document text
    • http://nosatines.mypressonline.com/46052880404.pdfIn PDF document text
    • https://cdn.sqhk.co/pulurune/kU5hh49/any_call_center.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5ffd6f02821ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483855/normal_5fca9511c0dc6.pdfIn PDF document text
    • https://cdn.sqhk.co/gowalitusiwa/Qgjkjae/bulk_modulus.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/hhRqN3p/instagram_video_downloader_application.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/uhbhhgi/99465283811.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sakogabutal.onlinewebshop.net/duchess_of_malfi.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_4a062bf78c89436c84110ae33728b9c1.pdf?index=trueIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_313e213e15454e4c8f24403a4b5e3837.pdf?index=trueIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_d99ca2bd4290454cae3d5484db8fa529.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_off0000deba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 5464 bytes
SHA-256: 644a51a267ece0f4ca1bbf5fccafeaba3ddf08d5ed2b6fdc717a36631e1bd952
font_01_sfnt_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 16456 bytes
SHA-256: c8d61a27cbeaa5cfbc1fdfec5084408d8e7eba82539d3f9306bddfbbb20e85ed