Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f29b6d061e4e58f…

MALICIOUS

PDF

83.2 KB Created: 2021-09-03 00:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eddd9e6460bfe8d31b9588215734939d SHA-1: 4695c45e1ba9bee549335e5f2ae096b53011dd99 SHA-256: 7f29b6d061e4e58f4d78c15cc328df383a066dcad6eea5d316e05cb3305b5c14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The file's structure as a link farm suggests it is designed to lure users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://catamma.ru/uplcv?utm_term=caged+guitar+method+pdf PDF link annotation
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1611bd978ab828---lofuxojeriluweli.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/15910434566.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/8f4d67a8259ee813432a51601c5219da/masefudikaforofozupebugi.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/toxamepusukemovuduloli.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5888817bc---zazotipamufe.pdfIn PDF document text
    • https://seikico.net/img-tym/files/jupupapi.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701bead0fc9---98449149830.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/miredomanedefi.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85368d9916---40771565087.pdfIn PDF document text
    • http://dmkert.hu/files/file/56606043538.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/da10abfccbd72044ad938edf737bf2c7/63080181282.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d90b506672---xilatuvibojawereves.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161293c09233fb---zofabedebufezimisur.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/84397612512.pdfIn PDF document text
    • http://erex.hu/upload/file/bolovizanufavejegadozaw.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3cd3a88e7---konevemuwivig.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/54121552460.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/mumudulidedanebiga.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/p66an4att9mo1h1j4auq53tn44/lileburinabenejopose.pdfIn PDF document text
    • https://vieclambanhang247.com/upload/files/13318489453.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/bakexexawob.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/fisavubo.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/vudanubunitutuji.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_off0000e11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11A 10760 bytes
SHA-256: abd01482e1ab1822e56cb707bd634b6b093dc810e78752cb0235afdef0fa7b38
font_01_sfnt_off0000f9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 17732 bytes
SHA-256: 25e1b2395c6b37ee0ec151adcdc2d14aa9a9ef7169c1792c3ed09118b80064c8
font_02_sfnt_off00012771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12771 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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