Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ab995fc03d757b…

MALICIOUS

PDF

117.8 KB Created: 2021-07-21 22:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d3b22346f28593c6bb718768e9662ac2 SHA-1: 0f62e328be042166e2611a50981e4efc01dce7fb SHA-256: 08ab995fc03d757b470eadac000c2d68ede236e5a15d9cd51334c431ab00623b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links are likely intended to lead victims to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://grandchainfamilyfoundation.org/clients/85333/File/56623997884.pdf In PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/warezivojefuwekudu.pdfIn PDF document text
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/fd9b8dabd2fcec145845b05b168191f2/dotifuli.pdfIn PDF document text
    • https://csn-alliance.com/data/files/gunutogefexodejobelitep.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5d2d6fd5b---42444161162.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/tunomekelo.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/i18eusj2bhioh2udgcb9mo0ep1/vugifufivefatebivevogef.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/polujuk.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/rofuvu.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810a04ca97a---minamejelejexuwifobidex.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f55736bfb0---zidilaguvuzu.pdfIn PDF document text
    • http://saltokisport.com/uploads/files/gaxixidexulukamejiwubifal.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5c06adb7b---jebogimonepovedadak.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088ed8f9e1ff---79324935884.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/47636333645.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/3c217b2b18540a229e46cd424e09935d/gunoruzerowum.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087e6e62ee33---8987018959.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093fdaca4fcb---89493949773.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ff19e4afd64f60f5bd955c29f80916c9/lanopemazum.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/fizoremevimumivesepo.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160790fd3534d0---donowet.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/64942172504.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/xutof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=hematite+ore+is+concentrated+byPDF 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_off00016677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16677 10732 bytes
SHA-256: 08e916a3e0098b106ccd9fb754a52685124aeb3f6948c18b2e01fdbd02e31f74
font_01_sfnt_off00017f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19730 19152 bytes
SHA-256: ebc1f41ccf0801939dcf9327c32ef4d661d23cbd63c8de7d670ab370a436bd14