Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2fe9ece436c188…

MALICIOUS

PDF

82.4 KB Created: 2021-09-03 16:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e4b9bc08e726106ab05cae3394d3718e SHA-1: 71199ca8fd7c0d1dd3eecbe1e68945ed584fee9b SHA-256: 5a2fe9ece436c18807159b965f6f81382857d2c682440312ef37c6c0cc856859
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b81b14a2711---fodasafevof.pdf In PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/91202663091.pdfIn PDF document text
    • http://hzqzg.com/d/files/bagonufefosokodeje.pdfIn PDF document text
    • http://julianina.dk/upload/file/faxanenufosugiwififapudi.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec5a151f2---44901982632.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/81ee4f37754e78688f62f06c636103e9/garedaju.pdfIn PDF document text
    • http://shesob.com/file/files/pexajojexiwafagosupumog.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/31059ba75f69da5a658ef98d38257a78/lonewutejugesusopewosona.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/zilazojozadunuzid.pdfIn PDF document text
    • https://artenika.pl/fck/file/7245964447.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d18f148477513f01ec11a692d584c7bc/bazaxerizixusokofi.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/d3ca4f8db9c787b9e54fbac8ac66be05/10677668521.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/8534734082.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/24432441462.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/51971056265.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/97155601532.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/webafumixodaxenejol.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/071a53d653bd4edeeb7d27369859d2a7/44545947244.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/99955408362.pdfIn PDF document text
    • https://datajournonepal.org/files/89514611613.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/189saa56ri43go6j8vmfsvldm3/dewafawojot.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/58540738078.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fea348949---kawagenagexuxitixivex.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/28333650086.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=iti+engineering+drawing+mcq+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_off0000dca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 18216 bytes
SHA-256: 373acc87fab36910c9f465686005a22efcf650901638b5a1f4a2593e00ab294a
font_01_sfnt_off00010b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7E 10812 bytes
SHA-256: 2d703ec68b3dffd0ca81ca3795a4988c64a08a5904de45bd0320dc62046a6b2e
font_02_sfnt_off000123e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1