Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbd2720c6b03a40…

MALICIOUS

PDF

94.3 KB Created: 2021-09-03 19:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ccdda3c7d697030b78cf31470e714152 SHA-1: 4ebed4a551fd17b51702befa922d67c90c0b124f SHA-256: ddbd2720c6b03a4060fc65909ab387054b8da0c5405c64bddb866350782ea6ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple PDFs hosted on compromised CMS uploads and disposable domains, suggesting an attempt to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no further context on its specific intent beyond what the heuristics indicate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://mtydizayn.com/userfiles/file/60664845199.pdf In PDF document text
    • http://baby-daycare.com/uploads//files/202108061058104638.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b2921582ea4---73783420144.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d0148afdb---nobafiwilot.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a78d1b6024d---naxokokifipel.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcac17edf4---86189582009.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/k3k2mdk7fbq8r1voh38km38qqp/medor.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/32179191681.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070242c51b39---nagelela.pdfIn PDF document text
    • https://restavracia02.com/userfiles/file/33753434344.pdfIn PDF document text
    • http://phanbonvbm.com/upload/files/xomate.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/vejuwemolazutizotan.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/17680779967.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160780ce0bd791---lezapagevisuwizodiwuz.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c13ccaa0d29---wakonuw.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/mopob.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076164888710---lejoxosurajirolu.pdfIn PDF document text
    • http://babamoleskine.com/files/file/dijamuriwidevozane.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc550b7289---81600486986.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba5369227317a616c47f778165c5a033/vusonopisanigimitafeno.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/logexi.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/k9do4doq4ne965qoa3j5imt96c/75970199450.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/fitepipe.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/jubuxoxojupuwadariw.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/6102e8c50e08a9868cf873957ae5e6f2/86649283190.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=moog+mother+32+manual+germanPDF link annotation
    • 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_off00010a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8A 10680 bytes
SHA-256: d23d0a2e2da2abb649b940efd022916a79d5fbddeee51ca0b3384a7514901262
font_01_sfnt_off000122f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F7 18484 bytes
SHA-256: 48335410bcac4f0b46713efd69dd29e2ced08a86076612cd40f5a91160ae6c10
font_02_sfnt_off0001535a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1535A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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