Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58e3324f94b52f3…

MALICIOUS

PDF

74.5 KB Created: 2021-06-04 04:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1d54a561eeb5e7c12d15c1b58b68d4a5 SHA-1: 11f1f0c2ab2a9fa03e58d2ee4a5c9b9d2c412c15 SHA-256: f58e3324f94b52f3e1e06dab0941d2ce44cf3c51b991d289b78047d13736a5ce
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9999

Heuristics 6

  • 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 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://lozipotod.ru/123?utm_term=yahoo+mail+sign+in+page+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503390/normal_5fd80b2f19c85.pdfIn PDF document text
    • https://xasewaverafi.weebly.com/uploads/1/3/4/8/134868265/1354092.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391898/normal_5fe1397d93d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_6021a46f16cf8.pdfIn PDF document text
    • https://sapafusazefo.weebly.com/uploads/1/3/4/4/134496158/7542253.pdfIn PDF document text
    • https://wawedubogefolik.weebly.com/uploads/1/3/5/3/135391715/volifide_vezoma_pakosafirix_gulerafafafe.pdfIn PDF document text
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/ac467648043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_60619c7859e9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_606cfc496ae18.pdfIn PDF document text
    • https://rebeluzibefu.weebly.com/uploads/1/3/4/6/134619862/noribaferov_xezolazudunis_kibukotijafuwoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_601ffcc66e991.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/2baf8708-2ec5-48bc-94fa-1833af4a7033/ximasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce759d09-038c-4f13-925b-f5d49323d849/24511300366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae6b517-1d2b-404a-9827-f5b435bf9fe5/the_revenant_cast_tom_hardy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd019ab6-10fa-432d-9daa-e6991985527e/mawisinorudoreluvoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c526255-8660-45f7-b2cc-8bb765d0a6be/gofoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca7e9833-5e8c-4915-89fb-d24998277c6f/goteboxixafutidusuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a36f46b-9bd5-4e5d-a296-c9b56fcf1059/nozugexusudigebidokufuf.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_off0000e8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DF 5276 bytes
SHA-256: 17ee8f0c5aaccf5694d6fb3d305a805a3128069f826354339aff664e24759470
font_01_sfnt_off0000faa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA9 10024 bytes
SHA-256: 0c60f75be9c1d02ab3870a0968cb6d501b90e3d877bc6f1d55602ca70dcb3e17

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