Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafa5c7eedf1652c…

MALICIOUS

PDF

75.8 KB Created: 2021-04-04 09:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 303685efe5e3fc9f83b54f5d5408c278 SHA-1: 0d1786a963cec7e8e5aad067fd124017cfc45779 SHA-256: cafa5c7eedf1652c969fca23509d20faf66025525afa1889ff117e5c3ec7d238
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs and the structure of the PDF point towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=edgar+balthazar+gallery PDF link annotation
    • https://sepolekabu.weebly.com/uploads/1/3/1/6/131606201/8fbea8b323e.pdfIn PDF document text
    • https://gikanusubidi.weebly.com/uploads/1/3/4/7/134756500/2d41b384eb7eb.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/telelibikufubirituje.pdfIn PDF document text
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/lozufemizetufojaruk.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/milifa-benovivepira-kebatu.pdfIn PDF document text
    • https://wepusetu.weebly.com/uploads/1/3/2/6/132695333/kegonawoda-xezimefusi.pdfIn PDF document text
    • https://pemesekisubabas.weebly.com/uploads/1/3/4/6/134659876/9d24a56305ef6.pdfIn PDF document text
    • https://kexefofivib.weebly.com/uploads/1/3/5/3/135305266/2071390.pdfIn PDF document text
    • https://muduzefob.weebly.com/uploads/1/3/4/0/134018051/5711392.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_09191ff0558b4839a801cf11876d5ab1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce16c3ef-288b-41d5-83d0-c83122293cda/zolotod.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_327fe60c96e243919b11ef9c91e4c24e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c47f42-d90b-4b47-8ae1-569f71f4a54f/viwurawovasivejoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2618d6-e29e-41a4-bf8b-f4edfc79d0b7/vehicle_pre_purchase_inspection_sheet.pdfIn PDF document text
    • https://dc5983eb-04eb-4341-be6e-5f763cf8c8d0.filesusr.com/ugd/979c04_ddf1111eb32f4c2e8f6e11f69effbd84.pdf?index=trueIn PDF document text
    • https://b9ecad59-ee1c-469f-8402-ddbad3bf215f.filesusr.com/ugd/84dab8_697ab40889cd4977bbfe650005ff96d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf27e41-88fb-47b5-a64b-72423933c2e6/76046292506.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/92953711557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e11fb9c-bcb0-424c-85c3-92871936b949/73205867273.pdfIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_7c49279002bf4ed29e428fdff877f8e3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49d72af-b8e2-418c-a6d0-64d584122880/88903578069.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/sitebugamanugobunik.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/95170825087.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC6 4684 bytes
SHA-256: 316333c6e2e53ee60c40f24a20470a8c2936e53c3003a1fe137505ce96f462c7
font_01_sfnt_off0000edd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD4 11156 bytes
SHA-256: f57eb0db14cce652bdfb7d5a109b7b3ab0eb453327e4353829c1ceeb82c1ca39
font_02_sfnt_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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