Malicious PDF — malware analysis report

Static analysis result for SHA-256 680ab0d26f68bfab…

MALICIOUS

PDF

83.0 KB Created: 2021-08-03 16:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0f05305449a7bf82b22084801db936df SHA-1: 054375f0c167a2d371e8b7ee6c61f4093d008fc5 SHA-256: 680ab0d26f68bfab6b82800444930b3fbe3fa2c313071affff7eb5f7b475c678
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://allytemp.ru/uplcv?utm_term=solucionario+biolog%C3%ADa+y+geolog%C3%ADa+3+eso+santillana+2020 PDF link annotation
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/48888308387.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/eaed4cc15735187fb5d87e58bb265c1d/70815207561.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/5315dcce1e60e53f4984cefa2ce3a23c/87609619690.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/doluvi.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/fafuwoli.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/gijejunukenu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/44bb43263da8e1014c175a9d9730838b/vonazekonojoz.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/8d49a19b06ddd52dc2a693165dd71ce8/tipibisofasifijigevime.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/0n4jvoms3forlmm8kspesr4nc3/vamugofusuvalumev.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608700f73ff02---jadutudijuduzujopazu.pdfIn PDF document text
    • https://ubitanduk.com/contents//files/xurikanidenokunabopufatar.pdfIn PDF document text
    • http://ipllaser.in/uploads/71679150496.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a20a1b9ba---80468354499.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/berakagunebexafedexaxa.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/4789025982d4839e255955e82e2b14e0/tawezelefenodilivesive.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c9913d980---zurifafafagekalok.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/63104445239.pdfIn PDF document text
    • http://dothi.info/images/files/56466443876.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/202688254.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae60bda865c---40375954957.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210714133554_7ogmmj.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a482e147f07---94995161761.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD818 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02A 18932 bytes
SHA-256: 705b8fae3fa063d50a01197b281a257c49e0199f05205be95aab5d05e830e90a
font_02_sfnt_off0001202d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 11308 bytes
SHA-256: b12c4369898bc47c7535537050589b19e05f584849e267dd52a03197ef58aeab

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