Malicious PDF — malware analysis report

Static analysis result for SHA-256 9630fe0135d5139d…

MALICIOUS

PDF

78.1 KB Created: 2021-09-04 02:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 41206d1f6fe68136fdc2c89e1cb415b0 SHA-1: c8678b8ae57a5b2ca81e2f5cd9181706559a2f97 SHA-256: 9630fe0135d5139d2ea5b14557a0e852f415124ca5cf02de57df462c69719268
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the presence of embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://kcpsystem.com/userData/board/file/28097168894.pdf In PDF document text
    • https://hizlipin.com/calisma2/files/uploads/tubedal.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/wodobonipafarapexepigas.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/rt5b194e2cjs8langvmoqacl63/15412785383.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/81065052030.pdfIn PDF document text
    • http://sinosteelcode.com/filespath/files/20210808042638.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/91973653468.pdfIn PDF document text
    • http://simonide.org/userfiles/file/37003398878.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/60225531486.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/96027715799.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/e0691751c65f8ae897dc508719e3c926/80305105828.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160881cde17fa5---satefunasojipob.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a91c50de5---ramagenamor.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/19288236189.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/2coh8mfiaqcfgdfttui2m0f0b8/11505503754.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a3beb7646d---36108900130.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/jaxeruzipixifa.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/6ghn79c7pis9g718c7knsnba48/vulusuzajisulali.pdfIn PDF document text
    • https://baptistfriends.org/media/wanaporumedezu.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612163d8d5c16---94244191327.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/ac188dfb34aab750c10cfa1a26121c29/87273986020.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608608a8df3cd---tedasedazagus.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/79875776655.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents//files/103037472.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=panasonic+viera+th-50px77u+manualPDF 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_off0000c581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC581 19920 bytes
SHA-256: 65d2efdb2263f4065285e943baff4d530194f95ed27903e474523826a76d481c
font_01_sfnt_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 11248 bytes
SHA-256: eb919b46fde68289bb1702a4ee9e592bd62b2d16becbe5409acdef530898cb1b
font_02_sfnt_off00011262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11262 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.