Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48dd7b47bfd77df…

MALICIOUS

PDF

83.4 KB Created: 2021-07-17 16:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 39e989b5f527eeab6920d4c71800c5a6 SHA-1: ef2842ee61f984546327b7e36498562fcf4d2004 SHA-256: f48dd7b47bfd77df78c29a2fe3ef07c8ff6d81f31090d69553691719fcc60738
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of numerous external links and the nature of the heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://abwmountvernon.com/uploads/files/11415978480.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8cciv13s47t664f73d6kd8sst4/dafutolov.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/tekalenovabesenekogipuko.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/vuc5f4mh63elc0g6g0po3ribpk/xusuvorizejumufujope.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/ruwebutazepividibebimumaz.pdfIn PDF document text
    • http://bookblog.kr/data/file//files/jilafevepiw.pdfIn PDF document text
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/67008798421.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/27912438131.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/bdca1f4b67aba1e332aff7653a895045/26150340301.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f11edcba9d0---ziwisizexu.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/12734945247.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/d9e26fd3d786e6260505a065d12aeb35/42219637254.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/61764449750.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/160e80d584c7b830988df1837cfcffd6/nawevitagiwirik.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/rijoxejobosinazaxutata.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/37324999831.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/zoxudo.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/a8fb0f6b4bc847b9f725dacbeb392278/miwalixakisiju.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/bibopijapole.pdfPDF link annotation
    • http://brenno-tojestto.pl/userfiles/file/lopujajilarasijobejuvoj.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/nudomigeju.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gezizixelidezitolugum.pdfIn PDF document text
    • http://oodow.cn/upload/file/210703061907808812tk86avz9m0k1.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/zasame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=c%23+linq+join+examplePDF 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_off0000e90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90E 17076 bytes
SHA-256: 81363115090b52f6d6db72d8e642cc683444897e6d77fa0a936962f6b56bef96
font_01_sfnt_off000115db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DB 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804
font_02_sfnt_off000128ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1