Malicious PDF — malware analysis report

Static analysis result for SHA-256 1191272edf877cfb…

MALICIOUS

PDF

73.2 KB Created: 2021-09-06 04:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 72fde0f090b81f8689ab496c81041597 SHA-1: d17f79531de66567a0220ead31a97afd71f300eb SHA-256: 1191272edf877cfbbd4c41c2f6d78de80cf409603876abd50e1ca9b8ca056cda
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload via the linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=bdd+framework+tutorial+pdf PDF link annotation
    • http://vzwsportenmuziek.com/content_docs/44240517828.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/38742349661.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/4fd31c297824e0057d3d9d068d210e37/latejilawoxuw.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/melabunewafimavutifosi.pdfIn PDF document text
    • http://ttc-investco.com/img/files/54547701790.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d7c319ec3e44695daa3e3d0b9504765b/xowimelepadinuno.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/4aff61fd2388718058f7370856a1068b/70432956627.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/7msp08iam6ijfif4063ubntm21/zatojifitiko.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/dipamik.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/3adf8a3e0f3cdbfd176a6673f8eb1c7f/18246592347.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083376b88ab7---sigajolasopajet.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f4967ede3b81a5c6e9f62a50edd9c5f2/pekesul.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/fuvezikapajovomokeb.pdfIn PDF document text
    • http://www.polni.si/Images/files/14459607895.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/32788499369.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/6d12fc8ba46029bd915df27f214342fe/nejipomidefafuzol.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/kadebufef.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/ridim.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/6dccabfbb4281876e79c2af47bda1877/tibiboruvalobero.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/egrsm5adth3qfddm5cl9hgnaj5/wireju.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/45715935981.pdfIn PDF document text
    • http://poorclarescork.ie/images/rejusovuluwodir.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_off0000bbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD1 17012 bytes
SHA-256: 047dff13fc309b2b06568a5ed3e4959c93b7bc115427da1e79293dc960d543d0
font_01_sfnt_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 10716 bytes
SHA-256: 51f6498c782ef94775357b409275bd0fca1a54a7ecc9feee5456134424c0e4e8
font_02_sfnt_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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