Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe4c213d1ca7c52…

MALICIOUS

PDF

80.9 KB Created: 2021-09-05 03:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ca4e69efd176f08aac987cb9a7a08303 SHA-1: 144a06fa3a3c6b0d1e7cdee6ebe5eba1949c5391 SHA-256: abe4c213d1ca7c52f9a8ff7b9e69ed4a244be8a23a28fccce8fef68a3b473cf9
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://lezeckastenakosice.sk/upload/files/perategubire.pdf In PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16117118c039d6---zamosemapejobenisesi.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/julugejawurodu.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/lotukuzofodivelef.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210809021118_zgv8g4.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/i6fhhf7apmdvqosl60e0q4gjnu/jowefosebesitive.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/76615024696.pdfIn PDF document text
    • http://yuqiaohome.com/uploads//files/202107291408047502.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/32849794717.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/fosabijavizevox.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/vamegexinisevugugito.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc78fcc75e---82789102107.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/18308011809.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/73559690457.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/40ac4d06dfdf9b86d80d3032d347d2b3/ravilolelatudas.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/ec89b050d03c91b1475ed4b22f40d5f4/47426982870.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/6882074654.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/br3s25v8ktklogdjkumnfmt969/44667298842.pdfIn PDF document text
    • http://trans-serwis.com/userfiles/file/47096775243.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/ur8kfdnka8ph8r2jgbestkdlsn/39732150724.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16080bfd85d25d---54034594072.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/80213827702.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/sasanetavuwumasesolununu.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/46773423552.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/jejanoxas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=droit+des+affaires+haiti+pdfPDF 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_off0000d629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD629 19280 bytes
SHA-256: ed9926d9a24bf850b79ab74b344c195548b6636bb1bd1963f3821abcf028c967
font_01_sfnt_off00010668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10668 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7F 10448 bytes
SHA-256: 2dca1e8703e473c5012d933dee29bf56c3e005a24823b8cd7c4e293744dbe19a

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