Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06c8ae2bc4a4264…

MALICIOUS

PDF

88.7 KB Created: 2021-07-01 17:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1ae3deeb0aa4284c2fc84e98c34323fa SHA-1: 34f6fee01b5460662de22db2b2187f9dd572ae5f SHA-256: c06c8ae2bc4a42640a1500adba318c0fcc68bffe21bf344fe3c66369c0ffb740
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, some of which host further PDF files, suggesting a multi-stage download or phishing campaign. The presence of a 'download button' lure further supports this. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://huntic.ru/uplcv?utm_term=jquery+export+table+to+excel PDF link annotation
    • https://avenue102.com/uploads/file/nosojimafezinedejugefal.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeb927b66a---60585315628.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1430c2f44a---87700556365.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c7f9405b538b2808b4bd56f7b5c3eefa/mujojajibe.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/fotunimoguwuwabuxi.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c3df174947b---43121918442.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/754bee5f9f0fd16421e044674a560815/koberupijakoxetozi.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160799790dabae---24679284485.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210615_2B65D203CBAC880D.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/jeviv.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/60511684720.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d55bd6e764e---3831850983.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebf27f19e5---60649683417.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607145421eaff---wavafu.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/86232d093f962771dadd551308cb2e0c/vixivuxakifuvefugilen.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/nejujowogazuwiwami.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9ee2ab4b9---xepavozenotezuzamomimip.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/30524327977.pdfIn PDF document text
    • http://zzliuxue.com/upfile/file///pasefenewabuni.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/qpli0oumobbd20k9jl4fl1elpi/rekufawowiginatodupef.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/taxoram.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160cae408bc928---xofanununaguwixe.pdfIn PDF document text
    • https://afayl.com/userfiles/file/zekavize.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/lotavutafipujidawivo.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_off0000f63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 10596 bytes
SHA-256: 8d2a2ce0481e576658c7aaf3996242475599a17701bb2a59202db76b08430858
font_01_sfnt_off00010e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6D 17796 bytes
SHA-256: 5d9ab40c7a31b86b04d2588dc8f63bd2d450085df9c3c48e8785c59f94b69d3d
font_02_sfnt_off00013d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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