Malicious PDF — malware analysis report

Static analysis result for SHA-256 abacc361d7345b46…

MALICIOUS

PDF

135.2 KB Created: 2021-06-28 06:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: df8c620df920a9bff26283e1eab71306 SHA-1: 6a57f28a0b869e3d3327a5ab0049461620d37d8a SHA-256: abacc361d7345b465764b6eb3565b5a6e6e6438b762ccf7cd73b1bd20ce55225
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 it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs strongly suggest an intent to exploit users through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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://pistant.ru/uplcv?utm_term=metaphors+about+poverty PDF link annotation
    • http://waterreducer.cn/d/files/tedeperativikagusezo.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607668648aff4---16320061204.pdfIn PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/darutewo.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/u22mng4s57bhgf9qrq8k56mip7/80649191641.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/38664752943.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2eb72802ed1437ff652e3669926b6ae7/74252085361.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/zoleburogivosukogar.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f846bab5c---sonibub.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080103f2f63a---ditoxoz.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/be3342f362ec4e372faae69dd0959ece/fozasukavamirojuw.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/f07280e897037db4fd04587483f7ef2d/tefuz.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1834033b4---89375643145.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160801dddb1442---podukimalamufoziziwisarug.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/4c7b43ddaab3dc5467b64a70b53d9daa/10777652242.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/gudewexolotuza.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/e87c1aa25173178d5d01f8240f0f30b4/35687003832.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/32868630949.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/beximunovu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/921c99417d01ec6f27ffe3a3ddbcb5ce/detomeze.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/fefunikufamujokufope.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3c7e90a4d---95587120690.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/19556721317.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/bs29s302rajvl7kfn8t5f2tuo8/pamazegimawuzevozaze.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607490b824c3e---rigisun.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3433286e42---22186756154.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/melurotoreves.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971b1c53b29---78521820090.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/471dc0dbd512ee0e1a5a88dc5482eb40/fofebalodilaxudibepozut.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_off0001acdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACDF 10520 bytes
SHA-256: 9eab9fa197ff9007350d954750298fe999d4dddb637f8e4f11185aad1225d69a
font_01_sfnt_off0001c4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4CB 19064 bytes
SHA-256: fee67fda06fd0ed0eaf39ad22f4c10a8e31b5f4fa9d7f9ac23d9af7102ebb73c
font_02_sfnt_off0001f550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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