Malicious PDF — malware analysis report

Static analysis result for SHA-256 988a15ca56a0ec69…

MALICIOUS

PDF

89.5 KB Created: 2021-07-02 08:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5db129eb8a53ddef7a2c9fe5d5b559a2 SHA-1: f09984594760a15e06d808688009bf03b7888b65 SHA-256: 988a15ca56a0ec697e84a443db4e7ec963d4f9b451e6136aa593d0b174b06f32
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://gopherandsquirrelcontrol.com/admin/images/file/zoguforovikiwideberisi.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4277a19b5---51828409401.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16087974c8da52---sumedubatajas.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084a645eaade---96118435461.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4tu3gt6qlckcjm1gs230t793fl/renabego.pdf
    • http://nadiadsa.org/userfiles/file/44652981669.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/4e4ee33493ca6fedd39bdb95b43ee3fe/91046525465.pdf
    • http://dynamic1984.com/user_file/file/98093180172.pdf
    • http://www.peretprod.ro/content-images/file/padapuxejopupaniruf.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c3650f2e9---20318194022.pdf
    • http://adance0112.com/upfile/editor/file/42935602578.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/243db560d86ba50115b36a233c5f52d3/65792780740.pdf
    • https://vicotelecom.vn/static/source/images/file/71261573578.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16078045e5d5d2---59365896889.pdf
    • https://majorsagilekvaros.hu/uploads/file/fulesimazexilumaxufu.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cd31276788a---39333661208.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f81016919---zemekukenip.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/5a296e1f6757bbf02bfc4b8f3672e3cd/26889404429.pdf
    • http://biemmecommerciale.eu/userfiles/files/32203890713.pdf
    • https://afayl.com/userfiles/file/31901455139.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/824qtjd3cpo9u3pkdema9qfm04/kegesuwim.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62276a2a15---folifun.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=call+of+duty+warzone+hacks+free+ps4
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/42161b6cc27aedaedc5c0b935dd8e868/6190081347.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b8.bin
15cf29f668745fe726c51e15962bcd5404abcacab38ebf72705f4bd6f643aae9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B8 11188 bytes
font_01_sfnt_off00011411.bin
06dcc0994df34a12516b4ae04e3b575dce1452d0af9e661c1b5163ab47da7d2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11411 17004 bytes
font_02_sfnt_off00014098.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14098 16792 bytes