Malicious PDF — malware analysis report

Static analysis result for SHA-256 549dc928f9e6fdf6…

MALICIOUS

PDF

78.7 KB Created: 2021-05-18 15:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 976bba07d9880d575e63f4790d57f4e2 SHA-1: 99fec7d90e7969e2620712fafb41813ceccd4300 SHA-256: 549dc928f9e6fdf6b5772b987e0051bf19a6886e3d10b66d5e42189bd7ce9248
156 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 0.9992

Heuristics 5

  • 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.
  • 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://baarspo.ru/strik?utm_term=candy+crush+saga+mod+apk+with+facebook+connect+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415081/normal_606e1f4ac28f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_6001c60a3e799.pdfIn PDF document text
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/9989660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_60369caddb538.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483855/normal_5ffb6c2e601c4.pdfIn PDF document text
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/sasefezoj.pdfIn PDF document text
    • https://rinezafuwokof.weebly.com/uploads/1/3/1/4/131437641/9741809.pdfIn PDF document text
    • https://naxosunibeg.weebly.com/uploads/1/3/4/6/134676516/25e01fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_60192f2669c7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471096/normal_6008db20e715b.pdfIn PDF document text
    • http://wafezenatina.iblogger.org/suxofam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_6022e937d5702.pdfIn PDF document text
    • https://bizudabug.weebly.com/uploads/1/3/4/7/134722823/dizinev_gisiduxosi_rubugew_gikawirazuk.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/toniseligiwuzux/peratipafobuvinezaniki.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/xaxufibet.pdfIn PDF document text
    • http://tuzajobiwazotuf.epizy.com/55280848716.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/rigekomifapawanuwuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/73703200686.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/what_causes_a_hot_tub_not_to_heat.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/damumepabuwifozewevix.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/juegos_de_friv_hombre_araa.pdfIn PDF document text
    • http://zelixaxiki.rf.gd/peter_thiel_books.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/vemujejevogebudijom.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF401 6112 bytes
SHA-256: 942b15c2b1363b61062b3d872e6f8976104b6f0a993f35b04686ec875b92636c
font_01_sfnt_off000108bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BC 10512 bytes
SHA-256: fbdfde8381c503dff4543cfe171da44b4147f907020c0b055755e7326d0e860f

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