Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe13d27cb7cf946e…

MALICIOUS

PDF

74.4 KB Created: 2021-09-06 06:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 14276878094946fd1a4cfbdcd0cbb4ee SHA-1: 90fbd52b15a459a004a920995137f273c0afc5ae SHA-256: fe13d27cb7cf946e864f6fa919616ff3d6236a10300a878281770a16239ac9e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous external URIs and link farms, including those pointing to compromised CMS uploads and disposable hosting, indicates a phishing or malware distribution attempt. The document likely serves as a lure to download further malicious content from these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://krisoc.ru/uplcv?utm_term=arabya+rajani+pdf+free+download PDF link annotation
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/94930053047.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/869c6de49bb5c932474913d4bfc0752b/boxawalozolaxevugiwikif.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/buzetagola.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/jabo4kd00egh3fd61am4khpob7/dutewisiperanaretabiraw.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b91516e74---75540157473.pdfIn PDF document text
    • http://retrofotr.cz/files/file/laxosebokifasebiju.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/90563637818.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/fumuduzodim.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f878d2da958---vixetulibudajewij.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///32009800844.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/gokagerefiri.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b48940ea1---wazegobovukun.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/16754904276.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/lilezomuzuvufeba.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baf5aeff5e---gixemubekitugakixawovo.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/65821267754.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/tujobapofobaxekif.pdfIn PDF document text
    • http://larben.cz/media/images/upload/file/20079986970.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/75261969782.pdfIn PDF document text
    • http://drxzhang.com/userfiles/file/xidikawokaselun.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1655c21503af48e576abc76ed7ce16c4/fobegisuvesex.pdfIn PDF document text
    • http://partnercable.com/files/xojadijukowupusevajetaz.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/bf2c66d84ec40c9f17f1054576e08d18/wakobigavojato.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_off0000bb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB7C 18504 bytes
SHA-256: b59d78b1372b1e0b1200f122c5e688dc290896ff6921fd31e442a5e0085474fd
font_01_sfnt_off0000ebee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEE 10676 bytes
SHA-256: e694ef55f92c77ce0a75115b227e6b19c1cd14873e5580f99e3a56bdd5269f45
font_02_sfnt_off00010448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10448 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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