Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99b7760c6e20fdb…

MALICIOUS

PDF

71.0 KB Created: 2021-07-16 16:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 58b8c97afddea5d025fc5a0bc8c5da76 SHA-1: ca1a6ed0b41f6075c4cbbb775daaf78b69d478c9 SHA-256: c99b7760c6e20fdbe3ad1d307471874399a2337be4c8424923df066ece5c95b7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The presence of a 'taste of home sweepstakes' UTM parameter in one URL further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://queure.ru/uplcv?utm_term=taste+of+home+sweepstakes PDF link annotation
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/8e36b21a4f1bc34d85f0211ab8d23d22/ledivutavovu.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a55e7dde54be0c9d9ac024b2d8ce50b6/52443609794.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/maxivonojojunamamuzage.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/n2qqp8bv0jgfp9b4bjsp7l1ed0/32081458681.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1abf1930e---79373216152.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/4901422310.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/6de3d4b8ae4e17af01bc095a6e421f7e/47370884268.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d0d4db8479dd5d56da619cde278a876b/lilufilejezedegimop.pdfIn PDF document text
    • https://promise-land.com/upload/file/rusofotupokoxaga.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc81372d1b8---vofexazili.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/duwagesa.pdfIn PDF document text
    • http://smartcevent.com/clients/871459/File/4832864268.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/7084f33e36909f969c148feadb772fc1/rerex.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ecb669d549---nobebokoxugisotesivo.pdfIn PDF document text
    • http://aven.su/userfiles/file/temipasofurutatumoguto.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/43f65a49f4c3fe1b87a7ef8cb829e7e4/vawubukaxatesekiwalositi.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160add75676c28---dipenugezotagizagaxunam.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078193096a3d---fizeromifenowobix.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/63458134674.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/99446549995.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/a879c506dcc19daa1c0f007521bfba5b/23183952145.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160984e1e0b80c---1162821600.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

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_off0000b540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB540 16228 bytes
SHA-256: 3c87adc42993cca390ebbf71aeb7f46e75f4436f90ffb729d738301dc3cf78aa
font_01_sfnt_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 10424 bytes
SHA-256: 3b6328a230183676e31a98ea2ac0e32f1bca76927ed888213c5600e4d9b82202

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