Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc6a24b51e9eb75…

MALICIOUS

PDF

97.8 KB Created: 2021-09-02 04:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0bba5b77bd9ded507c5729695582018 SHA-1: c8cd3aec1b8ff619971a48357b6c953a7b599fb8 SHA-256: 3fc6a24b51e9eb754372a5ee7c741f7e58a9e986956ed2405c431a0097eb7086
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to potentially compromised or disposable domains. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. While no scripts were extracted, the structure and numerous external links suggest the primary purpose is to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://provia-events.de/pics/fotos/1/file/ninegamogafu.pdf In PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/18226678794.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210807030543.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/kewadokadokofopuparawuj.pdfIn PDF document text
    • http://khocabien.com/uploads/files/mumaparikuvisinitekevuv.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/1533af4b2b0f55c70130c63858069e58/93707294248.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc848a1dfff---47868593392.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/3221812439.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/46657763787.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/tobeweposuzewipokuji.pdfIn PDF document text
    • http://randoquad72.fr/userfiles/file/56862728246.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/82448093337.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611a4515c144b---bawalalami.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da558e613b6---79605160591.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/3594972999.pdfIn PDF document text
    • https://bem-sa.com/img/file/juzawerisugimojolox.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160806c559494f---2262979719.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/27613232813.pdfIn PDF document text
    • https://tl-systems.hu/files/files/zoxotevivuvatusisalazo.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611401c76664a---jabozawosoner.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///vilijuneziwejalajuz.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/gokuxifomogumariwetedagal.pdfIn PDF document text
    • https://securitydm.com/slicice/file/nipedenu.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/97708523119.pdfIn PDF document text
    • http://gulfcoastlist.com/userfiles/file/22529670159.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/fijaguzaveke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=nanostructures+and+nanomaterials+synthesis+properties+and+applicationsPDF 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_off0001143c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143C 19052 bytes
SHA-256: 7dbf63abed8957d4b38e6e6fcb210fc580bafda53f6899fe9e50735f29876ea9
font_01_sfnt_off0001464b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464B 10968 bytes
SHA-256: 9074d8a5b007ca02232369815dc6c977f9ffd20870183752b1a1416baa6ea686
font_02_sfnt_off00015f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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