Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab129df836456e6…

MALICIOUS

PDF

76.4 KB Created: 2021-09-17 10:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 45693766b24cedab8cb49d362271e331 SHA-1: 5d43af9bb69e995cb325a8f58a209b89fce8d1c3 SHA-256: fab129df836456e6593e546bb16a38bb55a9ce95c06f835fb267423d8b9b173f
156 Risk Score

Malware Insights

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

The PDF file was identified as a phishing trojan by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external, untrusted resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecae8798cc---95272777047.pdf In PDF document text
    • http://innotec-industrie.be/userfiles/file/32972027345.pdfIn PDF document text
    • http://aadcnfgl.netsociality.com/upload/files/80367778552.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/kibakuxunabanobizun.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/pevemakoguxome.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d4b83971b---1601192818.pdfIn PDF document text
    • https://ibshospitals.com/userfiles/file/83246100728.pdfIn PDF document text
    • http://minipit.com/data/files/59038359379.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/badodazokifaxozo.pdfIn PDF document text
    • http://usateatop.com/_upload/files/25196113912.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/sexamowejositeb.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ca67b9792---bapuzagaj.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/476a00387ee2e071966db0e7d1556d34/fojomuwofeporasovogef.pdfIn PDF document text
    • http://sparkpro.lv/content/file/notarulugavololiwibatis.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d8ed63c7---94609389858.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613abe701171a---pifofamasopojasagagatefo.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/falakememodozomot.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109171401145862.pdfIn PDF document text
    • http://homeopathyhongkong.org/files/45629523793.pdfIn PDF document text
    • https://www.douggoodkin.com/admin/ckfinder/userfiles/files/rubokiwavotezovoj.pdfIn PDF document text
    • http://cpils.com/userfiles/file/nelusukowemozob.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/dofijag.pdfIn PDF document text
    • https://belretail.by/ckfinder/userfiles/files/zopakososulanelonuxuxag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=impossible+quiz+70PDF 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_off0000c73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4F 17372 bytes
SHA-256: fb6d6abc4994c891ecb3d4716dac3cd0f73c92dd55e27e6b615e3e97915d40f0
font_02_sfnt_off00010c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C25 10520 bytes
SHA-256: fb47dd353e59a53d9acc9729bbc7335f445b290da48b0cd181f2f931434d7ddd

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