Malicious PDF — malware analysis report

Static analysis result for SHA-256 46dc9baca2285b17…

MALICIOUS

PDF

85.8 KB Created: 2021-08-30 23:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3c4439483bd396d39102550d5654202a SHA-1: ab01ea7caef04f295a66a10ec25216fcb2e9d66e SHA-256: 46dc9baca2285b1742a9d904a63da6b716c018cec643216c0024db8eef48b1c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://pima-alarms.rs/slicice/file/76458483932.pdf In PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23a4e008f7---rivonep.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/jagorukeriroziresur.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608227e0e8936---13816476468.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/086eac19596d096e288121953689d957/numumeterejezusiwubor.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/2528237282.pdfIn PDF document text
    • http://www.agot.pl/upload/file/vijetiwapolevalipile.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609413680884c---52932230600.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083a179ab2af---torasajupolelakomifisipu.pdfIn PDF document text
    • http://ktcz.eu/files/files/17575949753.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/ee4d22598b664dd011ed216384d3fdb7/63797289399.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b5713181aee---dogekikujeguropaxepek.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/78481866113.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081c713ca06c---mogulupukikebinivu.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/noworupeferewomo.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/29171586103.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/q4hgdagh387mqr8kj5p5unqf12/6197129060.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/ef8f3905557b35ba6b954f79333f2297/83300279340.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/73482692908.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/39632942116.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1fceab23b---vulasorobijaxo.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608418b74d9cb---91256605054.pdfIn PDF document text
    • http://faulkfamilync.com/clients/c/cc/ccb94402b1eed20a0583117be0c0b506/File/lanejukekuk.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/49615590343.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b0674af91a97ba77f76476270dde2059/13916467986.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/noxoruguvomut.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/45314941590.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=poorly+differentiated+squamous+cell+cancerPDF 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_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 10996 bytes
SHA-256: 10bdc3e24ab9fceeef6c41b45b1a56f4358f8cadc954d2f247a9e1bed9f47d14
font_01_sfnt_off00010368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10368 17500 bytes
SHA-256: c23e539d5fde525f69491aac48c69adc4b0c7c9f1fb548f97db70e48bc29b8be
font_02_sfnt_off000130d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1