Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3e9f584194f332…

MALICIOUS

PDF

139.0 KB Created: 2020-12-24 20:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bc48525fd4d1e6e01c2d48dc88d74ec0 SHA-1: 500256fdd694197ba8296680bb87958ee0e40373 SHA-256: 5d3e9f584194f332c38d235d801ad28301ee90d4e88c00f0421b971ef1bf12e7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicative of a link farm used for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and a 'download' lure further supports this, suggesting the document is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • 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.
  • 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://trafficel.ru/aws?utm_term=dengue+guidelines+2019+pdf+bangladesh PDF link annotation
    • https://fojivefejiba.weebly.com/uploads/1/3/0/7/130775352/vetagulezazebalo.pdfIn PDF document text
    • https://zugasemoz.weebly.com/uploads/1/3/4/5/134593751/potusukivotodadav.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/rukorobukojudakarexa.pdfIn PDF document text
    • https://vomagorawu.weebly.com/uploads/1/3/4/7/134720662/ecc7c56ca2.pdfIn PDF document text
    • https://posoxoniboje.weebly.com/uploads/1/3/4/7/134713430/fuxute.pdfIn PDF document text
    • https://cdn.sqhk.co/xibumediw/RK97sUg/wise_live_online_teaching_and_coaching_app.pdfIn PDF document text
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/7161414.pdfIn PDF document text
    • https://cdn.sqhk.co/dupeguwova/jhiebTO/58490709891.pdfIn PDF document text
    • https://cdn.sqhk.co/zawafolor/SE63NRi/4758850021.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/7143bda.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/64485977401.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/91221124728.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/34244116682.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/98872080772.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFF0 2592 bytes
SHA-256: 9ca18bc4f5cdf21d02f9aa95c2d2ea51cbb943d64ccb5ba80ed11ae0ba9d7708
font_01_sfnt_off0001cb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB1A 5828 bytes
SHA-256: 9731b19679818f950b65059ce44cee0f634901fa0791177023aceb6b7fcab05c
font_02_sfnt_off0001deee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEEE 6800 bytes
SHA-256: 29d67dd11cc5c9fa8f9a2c2acda8c25b3532d99403441a7160b1c4af1e8df264
font_03_sfnt_off0001f58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F58F 11004 bytes
SHA-256: b90893d690c2230bd0e41f707e4e61377bee2c1be98a0ee85568779745cd04d4

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