Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f46679e57870477…

MALICIOUS

PDF

86.3 KB Created: 2021-08-19 01:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d0f87935751fdede7f42cc6275e544fc SHA-1: 25a62a3db4ca6aadceb9d153109fc7390db07f8d SHA-256: 2f46679e578704779b33eac27c43f28b953ea6094d9908df17dce0a1aafc464e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised CMS upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not fully detailed, further supports its malicious intent, likely to facilitate exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/95vtnb9nqo7ml4irbg6a4jjt60/sibafurujan.pdf In PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c1fb04e9c---85988261981.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd88896f6f8---39522123343.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee2a75caf8f---42679734027.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/19649912281.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/544c4d706741c9c3cefe3c6f21d1f5cb/2282842900.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/kafonope.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/45688541731.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/71738879455.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/zosizonaxexajoxaxegoduti.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/pedasowuxanomuweladiwi.pdfIn PDF document text
    • https://kasihpaham.com/contents//files/51883085938.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/32dceb1a38a716e2abf57ef2e06cfb0d/51670577968.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/47733038038.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/jijawulukisebisulaj.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b281f035eedc99deb271dcb045663771/4857935178.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610afc8aa21a8---vimevotutuwamanure.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/27c522148510a27f713bb1597800acfd/36102567966.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/91241984505.pdfIn PDF document text
    • http://elitvorota.ru/f/file/kirusixinuwem.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b93e73103f739b5942c45388cacec752/31482820474.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c3a277b3d---89406796426.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/ot6k8jfp21hhigeanf340g082n/tidoz.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087084abe4e2---godug.pdfIn PDF document text
    • https://memoservicesrl.it/file/wezasere.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/javowosujusij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=que+es+una+oraci%C3%B3n+simple+3+ejemplosPDF 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_off0000e49d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49D 20380 bytes
SHA-256: 18808d604561359dbfe41f0067550632813e969bf1704caae85579b050528787
font_01_sfnt_off00011747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11747 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5E 11036 bytes
SHA-256: eed9a926dc1498a984ddc815047c78fc7a16556d360edad442915609cf65c56c