Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0271f2aa2fa0d5f…

MALICIOUS

PDF

88.0 KB Created: 2021-04-25 12:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7cfc9665a7e44ae8e889e41688a26752 SHA-1: deb7c76fa7ce9eb4433edbcd6fc351f2ecf225a7 SHA-256: f0271f2aa2fa0d5f68f1f5be59fc1c447dd637c4156f749319d1e531d7b49504
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 0.9989

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://leonvi.ru/strik?utm_term=caracteristicas+de+la+investigacion+cualitativa+segun+autores+pdf PDF link annotation
    • http://lobotazawarew.iblogger.org/oprah_winfrey_on_wayne_dyer_death.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_601ba2f841a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485570/normal_6053186f80c9b.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/asc_842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446259/normal_6018e6f17857d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5ff86fe539a06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_6023cbb85a4cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479213/normal_5ff03b74bea97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447649/normal_5ff6ae1378d9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_601f0437402d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_603d199a6c885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_60240cf1e5a40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_60447268f1bf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365525/normal_5fee4031be347.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/dufekifaral/petewiwidolomegujod.pdfIn PDF document text
    • http://dosujag.rf.gd/56851799463.pdfIn PDF document text
    • http://roxudafemif.epizy.com/asus_rt-n12_router_login.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/38259923241.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/85391460150.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/gefij.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/how_much_does_brinks_truck_cost_to_rent.pdfIn PDF document text
    • http://sagavaxedowuviv.epizy.com/sujujirukujamib.pdfIn PDF document text
    • http://bilisedutave.myartsonline.com/practical_reliability_engineering_fifth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/52765168978.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 5288 bytes
SHA-256: 61db255496712992c7ccb0b73c0087bfcdef0d43d3d24e6408ba58de6493d779
font_01_sfnt_off000113ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 11688 bytes
SHA-256: 988d0626e1702a1ecab4c7b276f439b18e6446a6ef861ebafffb0a281c751846
font_02_sfnt_off000139fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FE 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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