Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f601f5dab2c444…

MALICIOUS

PDF

87.3 KB Created: 2021-08-11 18:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17a7ae205554f8ccdaa78b63c505cc63 SHA-1: ec323d83a7e1c3dfb2ba619877c5419c2e764257 SHA-256: 95f601f5dab2c4445b22871b64fc061f6e696ebb32a7c656638a94730bd6d765
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, suggesting a link farm designed to host malicious content or redirect users to phishing sites. The presence of a 'download' button lure further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • 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://catamma.ru/uplcv?utm_term=mini+militia+unlimited+ammo+nitro+bomb+mod+apk+4.2.8
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160d639f66de1b---54719725294.pdf
    • http://unicorn-furnitures.com/d/files/borijejolupuna.pdf
    • http://granite1962.com/clients/869125/File/pelusapituzojurapilobosa.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72172d3ced---28278121599.pdf
    • http://yokosohk.com/files/fckfiles/file/51657560340.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/ec581e11f02dc383bc9d8f003b3d430d/73573790483.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c903d5aa23a12b82266c6539fafe8917/47642006511.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/mogirelolovubatipugatitif.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9bebc0f978e5903c59240f4a23c18ee8/22924077250.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/297299e6ba4d0d9f7cc7488d79f0bf3a/xisefewe.pdf
    • http://icltindia.in/userfiles/file/tupekafenuzuba.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/67277a8af13f9baa555650a8d6e0e7e1/17132035862.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1610e1f5e45116---fipurababurazorasaman.pdf
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/sonugiwewuwove.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/4060d3d09dd58e46a1dd8c879129a9c3/sawufili.pdf
    • http://jncs.kr/page_data/file/20210804202659.pdf
    • http://irk-yoga.ru/upload/files/ropaguguperasetubiwawaguz.pdf
    • http://metabolit-plus.ru/files/file/duraxunomifidem.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86e3b665de---guxurelaxaligepexeteme.pdf
    • http://ubestsports.com/imager/files/20210629115313.pdf
    • http://vstarmp.cn/upload/files/20210801_220401.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d94d.bin
74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084
pdf-font-stream PDF embedded font (sfnt) at offset 0xD94D 16116 bytes
font_01_sfnt_off0000eea6.bin
aa519bc10b9a89180f42377c635187b800391d4917dca99c55dd51349e462d62
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 11180 bytes
font_02_sfnt_off0001088e.bin
34ab91a5add8addf4b168d61b17cb1bfe3217c23884fa181ec211762d9f8a5a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1088E 17560 bytes
font_03_sfnt_off000135b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135B5 16792 bytes