Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1efb334790f68c…

MALICIOUS

PDF

76.7 KB Created: 2021-09-23 17:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 130dd62cd9c3c6959742ee71b1691f79 SHA-1: b760171a4b812154ee185173249b31c47a69ffb2 SHA-256: ed1efb334790f68cf694a8b1242397e121d32b7a6fb5ebb054948de51af1dccb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 http://musicfriend.vn/public/default/ckeditor/files/lewivaxuwijax.pdf In PDF document text
    • http://aallergy.netlovestories.com/upload/files/lokexajaz.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16148a863492f8---71295860233.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/21883094132.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/54066568952.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/duwozuka.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/6721542216.pdfIn PDF document text
    • https://newdesert.pl/userfiles/file/12678050079.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/jejuzejomuvubasenime.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/93383660567.pdfIn PDF document text
    • http://markaz-e-durood.com/EditorImages/file/vuguwefudirekem.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/89168781908.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/fagunofibilosikifilu.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f16d0e5515---mutubu.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/lopebovupomunukufelok.pdfIn PDF document text
    • https://tipresentoio.it/images/file/xekuluranikut.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/mikuwupojegojimoxo.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613302cb770ac---3820216327.pdfIn PDF document text
    • https://latgalesamatnieki.lv/files/file/48213949546.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144a4f3b406c---60597859856.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/89739751863.pdfIn PDF document text
    • https://lensmam.com/userfiles/file/gakopogumeberap.pdfIn PDF document text
    • https://e-midas.ro/files/file/boputuxijubojezotose.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/zewolefamolowobi.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/68986739997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=relative+clauses+worksheet+1+answersPDF 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_off0000c915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC915 16680 bytes
SHA-256: 8e81229509c3bd2e0cb7a80d19501c05bffc86117194e021ac95e141e76f17ef
font_01_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 10768 bytes
SHA-256: 27cc1b0dd4ef0f04c82fc44042d04af7ac9e9441513c8cb17a6fb9e79e997484
font_02_sfnt_off00010d43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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