Malicious PDF — malware analysis report

Static analysis result for SHA-256 d651ee404a27d8fd…

MALICIOUS

PDF

85.9 KB Created: 2021-07-26 13:45:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 889599d4831cef8bce02a950f6c54c4d SHA-1: a69d97687e4ce4abf045956f0ddce7077891d9ad SHA-256: d651ee404a27d8fdab44ab52a95286463bddda071ca9207a50a6fe6d1f913116
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating it functions as a link farm to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users. The presence of a download button lure further supports a phishing or scamming objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084de2f73319---tukuwosedawuminomowotewo.pdf In PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/60582147960.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/b131d80c70534a632e8d46e12c538f48/42224290766.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/giparumodonebafetik.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-10/20210510003101521331.pdfIn PDF document text
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/23316927493.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/6tm2tqb4ff6gbqmhsptomloni7/57643863232.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/02pb6qekgtg2kgnicqn8a5dikq/78094268580.pdfIn PDF document text
    • https://brs.jo/userfiles/files/lofanexebotibazuno.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/50657391925.pdfIn PDF document text
    • http://waltonjohnsonfamily.com/clients/870437/File/tupesivovulodezosoni.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f7977b5e5573f94974e7321a051d587/18744954878.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b302a5964df---82753622462.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5416d8c2c8---51006333518.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af78f078c42---kujotu.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/mimewizojimaxumitewe.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/88433383531.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/bcbd5e01bab4c0bf3c06f7fdfbb5578a/81154344054.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/92927f1fad38710e3e7ba5e5560848e1/52548522864.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c39117d096---79320388799.pdfIn PDF document text
    • http://sivam.pl/files/file/22532867601.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/kpvlf8vc7bmq16jhe12k36tc25/4889689378.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/42930906887.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16084f7f5c9798---86886019320.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/1b537de72b0dd3ca939f8c7b81b4afd2/gureboman.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=freemake+audio+converter+full+version+free+downloadPDF link annotation
    • 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_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 10960 bytes
SHA-256: 071ad01103584375e0f575f43959320875b253d86f1a5c04cefd7d5b99c976bf
font_01_sfnt_off00010352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10352 17776 bytes
SHA-256: 593f895e0b95429a6cf364524fee8164072f49c93339c62814db33a578c5e45d
font_02_sfnt_off00013187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13187 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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