Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf7a51d0fa9de967…

MALICIOUS

PDF

82.4 KB Created: 2021-03-07 23:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 60c022e991699b568145fe4a9ee8bbee SHA-1: eaf64904b91ae1b15cf65cef8490e95b939b2327 SHA-256: cf7a51d0fa9de967db725d273b285b2212c36c37408d321297f29bd451ff6b64
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://mezovuduw.ru/strik?utm_term=samsung+gear+s5+release+date PDF link annotation
    • http://xejopegig.mypressonline.com/gopowaliwonefemuxap.pdfIn PDF document text
    • http://sifimomikev.sportsontheweb.net/data_analytics_tools_free_download.pdfIn PDF document text
    • https://famemizi.weebly.com/uploads/1/3/6/0/136006686/pevefuni.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/9993503.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/gudomomadugufaxokus.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/wumizubafama.pdfIn PDF document text
    • https://bakofegep.weebly.com/uploads/1/3/1/3/131382808/fusuduka.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/download_altered_carbon_resleeved_2020_sub_indo.pdfIn PDF document text
    • https://talotemeve.weebly.com/uploads/1/3/1/6/131606578/4394721.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/suxugipipolazog/39461751925.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/79160896114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0f37171-ffb0-48dc-a139-7231d765c19c/integral_cos_x_csc_2x_dx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/953ee8b0-7ee1-4b66-ba45-10c1e610a110/2010_town_and_country_transmission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7104302-87ec-47b4-9fad-34684f2727df/como_tomar_la_cebada_perlada_para_engordar.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/battlenet_ing_slow.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/dantes_inferno_canto_26_summary.pdfIn PDF document text
    • http://safedoguno.onlinewebshop.net/wunajagodemigipu.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/1244289090.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/corporate_accounting_jr_monga.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/zadewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851ba2ce-6e69-4a0c-9f2f-c57e8136f33b/which_palm_is_read_for_ladies.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/what_does_ren_kou_mean_in_mandarin.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/lerapogenaze.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF455 4384 bytes
SHA-256: 0473a51268cf8eaf77bc5e9223ce44ed4deb308b7c5c30bc53bfa9ee97d0adc0
font_01_sfnt_off00010370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10370 5372 bytes
SHA-256: 05320414efb35dd976b2e6d8dfdb171ccaaaedd45dce1f85679d5d9f351c8001
font_02_sfnt_off00011596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11596 11280 bytes
SHA-256: 3d9250c96cac0220acbbff82e8f4778f6506b46e18139fc345acbe4d04c5d1ee

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