Malicious PDF — malware analysis report

Static analysis result for SHA-256 6124815ac17cf929…

MALICIOUS

PDF

82.2 KB Created: 2021-09-20 02:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 0ea7ec9814fa10c29d0e49be9cbca46f SHA-1: d34ac2ba2685dc8a79d32f0c65154bfe89706619 SHA-256: 6124815ac17cf9297777207a981e5d430203fc11e5e0799757aa06a062ef70d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs that redirect to external sites, likely to host malicious content or phishing pages. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=pasar+jpg+a+pdf PDF link annotation
    • https://ketdoanbus.com/webroot/img/files/33592362944.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/matinizanim.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/93002595005.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ac8529360---gumixiripediwurujix.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/bt0ti2qaju1h74gj6ldi0qsqrs/mumuka.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/79169073878.pdfIn PDF document text
    • https://cmoretv.com/userfiles/silofixefivowal.pdfIn PDF document text
    • https://citronel.com/userfiles/files/guxirewalu.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/75903560867.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/70514492313.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/15566046520.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/zawisikimonobix.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/46013597417.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bb6b6a271---19327635277.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/posatiku.pdfIn PDF document text
    • https://halkum.rs/files/guwewuzeleras.pdfIn PDF document text
    • https://kratky.eu/files/file/50115130108.pdfIn PDF document text
    • http://na-bytecek.cz/UserFiles/File/15288562260.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/12122662693.pdfIn PDF document text
    • http://itexpertdog.nwoasis.com/upload/files/23495201350.pdfIn PDF document text
    • http://aktifbant.com/resimler/files/kexejajavurumaba.pdfIn PDF document text
    • http://hzdsbg.cn/uploadfile/1630922790.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/pt30ncpdhk09qv1355c15nepoj/67259545483.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/xuvuwulizebumise.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/virasopikisobodikixonek.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://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_off0000dc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC03 18672 bytes
SHA-256: 3ac3c0bc0e9c4071d6af3315d337b8c52be000535740151d493ee8a1b2b5cfff
font_01_sfnt_off00010c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B5 10212 bytes
SHA-256: c31c685613f4b4a9f11dc996a084907d667b3eda388f80748ae52366f3b391ff

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