Malicious PDF — malware analysis report

Static analysis result for SHA-256 182297c7daa2718f…

MALICIOUS

PDF

78.2 KB Created: 2021-09-17 03:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 02cffddbfdb3ec6ddbb9b3e0b1d0d1a3 SHA-1: 970457ba4e403a4c300b4f81bb103a1dd1e87801 SHA-256: 182297c7daa2718fed8b58158eae18de356475d884f4a57e73bfd57d0e9f3fb3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, containing numerous embedded URLs that point to compromised websites, likely to facilitate phishing attacks or distribute further malware. No scripts were extracted, and the document body was unreadable, but the presence of many external links to potentially compromised CMS uploads strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://synerhu.ru/uplcv?utm_term=best+android+roms+2020 PDF link annotation
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142e81ea7b9f---47643958368.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/zuxovo.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4f657d59902503e1b98b3ede10d034d1/nirazelekizogedotuvas.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138305182306---vakugo.pdfIn PDF document text
    • http://aguito.madteam.net/ckfinder/userfiles/files/gojigul.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/gukopiburilixizokoxa.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/52557121153.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/3761526721.pdfIn PDF document text
    • https://r4binsh4h9-att.com/contents/files/given.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/89493887282.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/xoxazeki.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/65352443160.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/11970446963.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/fumidoxawi.pdfIn PDF document text
    • https://telorgabus.com/contents/files/vimupa.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/o220ef7emd83qv0smiqbtoapd3/15418239901.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/2157b4aaae65bac630e4f4555e0c86ce/68541317783.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3413801d6---79640491340.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/fizasatomijuvib.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/15297970938.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/30520659085.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/18555376136.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210906_65E2D46E8ED98F10.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_off0000ce75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE75 10656 bytes
SHA-256: 74411f01f733546b8753b78d36fb3d932c5029977e984d25650fc5e6864c33b1
font_01_sfnt_off0000e6e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E9 17260 bytes
SHA-256: a7b24bfc99a816b24773168393ab15e129985f33b04060b504f27f7fb9746885
font_02_sfnt_off0001133b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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