Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5e019b549880d0…

MALICIOUS

PDF

89.6 KB Created: 2021-09-23 09:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ecb16bdc89fa83b3c890c80f96d60e3 SHA-1: 014813d76e1ed083e650182ec575f93598b0285c SHA-256: cb5e019b549880d0530385d77c9ca57ab96d1bf911ce937e1ea8985149e913d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which appear to be compromised WordPress sites. The presence of these links suggests an attempt to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://philabc.ru/uplcv?utm_term=the+wolf+of+wall+street+123movies PDF link annotation
    • http://robalton.es/Albums/images/file///bisurubinetazezijoxuzivi.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/kojanumipesudivunogelodud.pdfIn PDF document text
    • http://signauction.net/userfiles/file/lupexiguxibipexubovojat.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/9507942872.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/27562733233.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/59868024459.pdfIn PDF document text
    • https://unitjaya.com/contents/files/31816788739.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jobawubuxenazukusumeno.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/5k5s1ak66midr642rp68vcoqqn/5283247533.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/0e1a7b08dde1eb9ce39d0406adb9b552/30824822857.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/kokus.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/legozabelasimazoruwa.pdfIn PDF document text
    • https://didaktika.drmix.cz/uploads/files/wanopabijizugeruj.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/82984839958.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/mezixanifoxabinaruraxa.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/jurubo.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9d85f2434---17538918040.pdfIn PDF document text
    • https://designclarf.it/file/84594184125.pdfIn PDF document text
    • http://osayit.com/images/file/sumunijezijufapobav.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/45703512425.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/51095657306.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/lituvumawozunajevikagape.pdfIn PDF document text
    • https://softnettechno.com/sribati/editor/uploadfiles/82482790880.pdfIn PDF document text
    • http://kaies.net/upfiles/210913055423934015m8bhr3.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_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 10832 bytes
SHA-256: b9b0f84244117e9724755650188b4d39144639f30a0c8e203ecafec4402b5703
font_01_sfnt_off00010ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED3 19324 bytes
SHA-256: 60fd56fbada335b5864347023ec241335af9d74acac4e2eb9e1a1c3b66b73045
font_02_sfnt_off000140fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.