Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd14100132805773…

MALICIOUS

PDF

83.9 KB Created: 2021-07-31 15:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fca7b7c0a3f1ad9372d49bc902b4e648 SHA-1: 27bf60615ce74296b0cca2f60599b493e8ea58b9 SHA-256: dd14100132805773cd7effeb05ed6cfa16f36aa8b425d391408eb9f8f2fcade5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a trojan payload. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://coretry.ru/uplcv?utm_term=how+to+write+a+job+counter+offer PDF link annotation
    • https://aslimitada.com/userfiles/file/xazurez.pdfIn PDF document text
    • http://dichvuketoansg.com/luutru/files/36340306433.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3b71f3c9d---16385364681.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/tapalunubivadoveruvageg.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/57e49d08764b2a98c6c7019a78c4e8c4/masofedufojababalux.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/68063742788.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/35131703068.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/bsfijsmo2ddas2a04aq4q4kk2l/bavakevugoron.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/26413467579.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/bujiji.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/46e9a5694dc4ba1f5fae7d39b694fd18/75645592818.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/9691088640.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/kinatetototiv.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/4dfdab739e4d2d2c668247a5a9455a00/76232083535.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/xopatizelupi.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a494f8f9481ad328e6319f1c18665be4/67128301780.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/jifijapiterizezifizel.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/17564322126.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/gutotejimak.pdfIn PDF document text
    • https://sambelteri.com/contents//files/sefuradasazog.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/84051924178.pdfIn PDF document text
    • http://camonetinternational.com/files/file/xulubotusijumares.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/1f4a8164b58e7f28ca90380dcc1157bf/26486699422.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/0llsv1l1l1c9btaa8qrksjnde6/1425187521.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_off0000e77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 10564 bytes
SHA-256: 6c8b2f0ede4be4937d4684d9501e6a98593fc34928472a223e2aac25538e6e0f
font_01_sfnt_off0000ffac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 16556 bytes
SHA-256: 0d5e28bf71cca8d8c07d5c6d3057873700aef1ff42e77ea7c5fd8ab0b2bb8585
font_02_sfnt_off00012a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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