Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a2df17d1db90c2…

MALICIOUS

PDF

83.4 KB Created: 2021-09-05 08:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f1d14e15960a5386e1ff9b3c4168cdcd SHA-1: 97a09349199343409d20bcb53ed6e53cbcfb38b1 SHA-256: 32a2df17d1db90c274230e3e5ea71e1cd871f8987aac371a9be76c1233002167
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, such as https://laborke.ru/uplcv?utm_term=polymer+composites+applications+pdf, are likely used to redirect victims to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=polymer+composites+applications+pdf PDF link annotation
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160715c3fcdf84---gasofab.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/nobawatevidi.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/zopobotawolejav.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/badevoliwalulopobukoj.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puzebexawatunefoz.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/jodojetavegilemavob.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/kelujovujutopofaj.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/kiwesovapekexakaxub.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/vejss4qi9g1ahk3lu3im85p6me/38666113245.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/rqko0817iht36cui6fa7e5k2tn/rajarivijapovugakopoziv.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/70747717842.pdfIn PDF document text
    • http://poliinc.com/upload/files/45339056799.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/nojose.pdfIn PDF document text
    • http://houselandia.ru/files/wubemuduruxekuzonu.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/13343306549.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/41796884840.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/89201597654.pdfIn PDF document text
    • https://ovalpolycoats.com/media/gutog.pdfIn PDF document text
    • https://sergeca.com.ve/ckfinder/userfiles/files/pusotisesajej.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a98fa5df2b---13353677180.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/78d8fced729493a8d13694a640ffce9f/57200481454.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bdtamtbmeljma54mhjd7jr3j34/12835755093.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/50187979477.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/wefavazazukaguf.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_off0000e2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CF 16888 bytes
SHA-256: bfff4b34971be1604c82b861bdf579ec15ca19a38e293507717f49059858847d
font_01_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12692 10896 bytes
SHA-256: 72a3efe95b60c9300317e94d5872d253c01e96e3a93ecf72f5be36320d4af084

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