Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b47bdca64e2b9e…

MALICIOUS

PDF

67.3 KB Created: 2021-09-26 04:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 49c79b19f3fc386d98771a8b0d326cbc SHA-1: 3eecfc5162b9892ebc489f020a3ab6806c5bccbd SHA-256: d9b47bdca64e2b9ec1a6978f4192436bd207240e94e09cb3710831abb1e1f7ef
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a full-page screenshot disguised as a document, with a hidden clickable action that redirects to external URLs. These URLs are hosted on compromised WordPress sites and disposable domains, suggesting an attempt to distribute phishing content or further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=apn+type+android PDF link annotation
    • http://chiengthai.com/file_media/file_image/file/18595838742.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/bimizopilibewitalago.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/ditefilovevejodivowazuz.pdfIn PDF document text
    • https://labelmarket.pl/data/file/batadelinozogixotaki.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/paterozorizovodavikuj.pdfIn PDF document text
    • https://vitanov.rs/files/xibuledir.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/dewakejemitujidekuve.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/75112282454.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7960bd5ad---ziwaxe.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/jenapoje.pdfIn PDF document text
    • https://ags-car.com/upload/files/sitojirawo.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/josovigerizasifapom.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/pixupirepope.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/94ba180fd6ff9af154c7ef5a833d64ee/pinopibonubazejexivetabaf.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/c7ee7c9666de681c6fd5ea474d5cd0ce/lefabegixatozawozi.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder/userfiles/files/jejetarimowa.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/1789984879.pdfIn PDF document text
    • https://norservis.com/files/files/fobobivelofuk.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/55111935871.pdfIn PDF document text
    • http://merklink.nl/site/data/ws/files/29485428834.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/87308769629.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613ea20d63bfb---44259596511.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_off0000ad36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54D 10264 bytes
SHA-256: 876c4bab1ad23a441682d3c9d562de0efe63e3f54782193bfe350c07c3d83cae
font_02_sfnt_off0000dc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC84 14232 bytes
SHA-256: 966076f960f703e6d134b4848fa67b8d9d27a4b1a927defde5c82d95c5e63e25

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