Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2aa6bdaf0e13b42…

MALICIOUS

PDF

89.6 KB Created: 2021-06-26 01:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad0cf19abcb7bdb347f1fd53acbab16e SHA-1: 59251b694b7d4b0ff921c72512f56f4f9177493e SHA-256: d2aa6bdaf0e13b4215d0ef9bb43f407ad9050f4e9c8087cf54d59d9469b8f1b9
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs hosted on compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are designed to redirect users to potentially harmful content, aligning with a spearphishing attachment attack pattern.

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 https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/c80ekd0u9amcn6f84sgqqnsks0/mupebimozitugutexuve.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/4bc23a7a48aa6fcfb057af3e55ea774a/lusebupozuvanapibipa.pdf
    • http://notariocprietoa.com/notaria/documentos/files/ralij.pdf
    • http://licausi.it/userfiles/files/punutegunozeguvewawis.pdf
    • http://myjobcareer.net/userfiles/file/2021052508582273499.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/5b1n3onhh4hggc7vid6rl7iu2b/tufijabexaruforiz.pdf
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/gv5vmpbf31gerj9ebfg82ciabv/jurovew.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4daa58674---simugaxeruvubudiw.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/dd407e21d491e890d083a033e8480b75/xapibatafatemizarumu.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/eu018mul4kifclnj7fkk1085qb/37708837865.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16077d373c430c---dapisagifijaropiz.pdf
    • http://dokumsuzgec.com/userfiles/files/gojutiwuguzogafejeva.pdf
    • http://narnivet.com/userfiles/files/rasafebepajonona.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d597c54a1---69777523940.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/932c4c06f635ef5c42480eb0dee5f76e/54298893035.pdf
    • http://chiangmai-clean.com/user_img/files/93294095541.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/3nmtqdrg935uj1ts667sbj9bi0/42343096313.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7de12406a---jewimotegumurobi.pdf
    • https://okazionche.com/files/totarazodulazujopu.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afaa2c428b5---ruvaxozisezosiwefibek.pdf
    • https://pk-kuepfer.ch/ckfinder/userfiles/files/29271109798.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/m0nbk6jp9826uofnkviba5th8e/pobomisazarisajuno.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/aplq5jufstskkikjr8a1ulm6me/3791144716.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+language+of+composition+3rd+edition+teacher%27s+edition+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_off0000f809.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF809 16792 bytes
font_01_sfnt_off00011020.bin
dc3d8f610c4164bb621fa7e50cd5f2abb21c7b4097b015bf499b4736dfe6cc15
pdf-font-stream PDF embedded font (sfnt) at offset 0x11020 11336 bytes
font_02_sfnt_off00012a70.bin
a9fc2c6db5f9a98c7c925063b65cc048c13f21b739ee6ca7895d88754a0e3a5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A70 17684 bytes