Malicious PDF — malware analysis report

Static analysis result for SHA-256 677ea58132a841f7…

MALICIOUS

PDF

78.5 KB Created: 2021-03-25 16:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8973ce2174bf4085f930a98d42b2190f SHA-1: 899a9d8436b2a611eb6025e1ad2b84bd3e27e809 SHA-256: 677ea58132a841f7ed46f5064f08cb570476ffc71e8a41101042778272c7aebd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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/123?utm_term=york+chiller+maintenance+manual PDF link annotation
    • http://bio-ita.fun/80016354336o30i1.pdfIn PDF document text
    • http://sarhello.online/wokofametizemufenw8mao.pdfIn PDF document text
    • http://yewes.fun/what_happened_to_iola_at_the_end_of_the_last_wishbw4tb.pdfIn PDF document text
    • https://polatubogo.weebly.com/uploads/1/3/4/5/134598163/vajuzif-zajebupesixoru-xebawesokek.pdfIn PDF document text
    • http://albatros-trans.ru/wolusimeduzawotedorvzd0b.pdfIn PDF document text
    • http://icily.xyz/divergent_full_movie_download_in_tamil_dubbed_isaiminirgmz3.pdfIn PDF document text
    • http://arendagg.xyz/18423546244ucls3.pdfIn PDF document text
    • http://senteber.site/hansel_and_gretel_story_downloadq1jwh.pdfIn PDF document text
    • http://appeal-ig.com/maus_google_drive_booksq59ch.pdfIn PDF document text
    • http://douchehq.xyz/brandsmart_outlet_miami_florida2r56u.pdfIn PDF document text
    • http://natfreshik.fun/apple_tv_3rd_generation_hackdmayu.pdfIn PDF document text
    • https://nesotufofiwin.weebly.com/uploads/1/3/1/3/131381712/6dfa3ac62.pdfIn PDF document text
    • http://1offpark.xyz/xudarezewadusolub73f4o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc4aaab-a6e7-4a2f-a672-1f8915daca7f/covid_19_news_texas_governor.pdfIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_3825c6c07103467c9ef3fceb513678c6.pdf?index=trueIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_0dfcc8225d2a4324a6de9e69d4b3bd80.pdf?index=trueIn PDF document text
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_673db861fad04e7291641f01d5f897d3.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_off0000f744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF744 4884 bytes
SHA-256: 81e4362ec318069d35c97600a032495427ed602ff8d26215cdb8191f42d11d9e
font_01_sfnt_off000107b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B2 10980 bytes
SHA-256: 9e231588e71d33e8bcf5900028449a8bbc416e3c0bfeb2bdb591fda5fce37802

Open this report in the interactive analyzer, or submit your own file for analysis.