Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7510d34f5e4baf8…

MALICIOUS

PDF

85.6 KB Created: 2021-02-08 04:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cf0deca0c1c9fd65db7af6bcdc43ca9b SHA-1: 05872e352f4e470e72b4e7c9d1ee5962f5d37906 SHA-256: f7510d34f5e4baf8620d3df16d4380fdb10e29b20afbb8f878c489b43ad52af7
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 0.9996

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://jacksth.ru/aws?utm_term=forming+esters+from+carboxylic+acids+and+alcohols PDF link annotation
    • http://cleaner360.shop/centipede_game_free563zr.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/higciaQ/shark_shark_run_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382003/normal_60009f4f38c34.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/beoiigg/nilunare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402933/normal_5fe019a595f9e.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/9HiiEEo/piano_kids_music_songs.pdfIn PDF document text
    • http://reabook.online/new_holland_tractor_tc30_manual4us3e.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/hgiKgi8/43799597879.pdfIn PDF document text
    • http://lishop.site/cz_75_owners_manualytw2r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528915/normal_5fcbd8960591b.pdfIn PDF document text
    • http://wunawuwome.22web.org/35283352491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_602091dbe8d54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409246/normal_600a50f34aebf.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/disidupabub8t4gk.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/t4iaGih/my_smart_house_reviews.pdfIn PDF document text
    • http://jarizodej.22web.org/fusiliers_marins_reportage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vedezaduxi.epizy.com/87665248156.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 5488 bytes
SHA-256: 00995adcbc924003893fb15b1db1e00c36b885a49e80d536cac5d064734b44cd
font_01_sfnt_off0000ff48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 11032 bytes
SHA-256: 9d35641da21f3fe5e2a5b1cfde10fbe3d01baa41cc58c19be7fa5c0b52690fba
font_02_sfnt_off00012526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12526 16116 bytes
SHA-256: d82d87826c3064c03a306f79bf7d04151e9ee92f23bd1ad67cae8d9f5ad36d9b
font_03_sfnt_off000139ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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