Malicious PDF — malware analysis report

Static analysis result for SHA-256 814325647d333502…

MALICIOUS

PDF

80.5 KB Created: 2021-06-26 18:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d52953eb96db49396853b8e5def4362 SHA-1: f1cb665b5c51db34ad5554ab274a71074663cd78 SHA-256: 814325647d333502bc1480b8c5cff90a655a06f44f93d71a6407db6428cb88f3
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document's structure and embedded URLs are consistent with a link farm designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=work+from+home+rent+tax+deduction
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8c249b749---15854798088.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c33238c64a---12017844784.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/h9ej26n8jrgtvp4tu1bnlk7357/86442351371.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3168a1f8c---34165142656.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea8f84ca5b---jotiku.pdf
    • http://sparkpro.lv/content/file/92861296359.pdf
    • https://aglogistics-bo.net/userfiles/file/86443996849.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf3111924---17835591423.pdf
    • https://jordanadams.com/ckfinder/userfiles/files/tevewijesuboriruwesejidaj.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cfc110bf7aa62b6c8e8cbcfa5a187dc4/sisaluzurazoziron.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0c484a5de---36991310350.pdf
    • http://traiteur-ribot.fr/userfiles/file/gidurepolepawuke.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aabe99e39---besasegexesanoruxexoj.pdf
    • http://abpaluso.com/upload/file/gusurifanasi.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/7e537b5d7bada32b3be5bbb53e7a149a/zeregokipujidiz.pdf
    • http://alliusie.com/userfiles/file/16314943963.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/kitunizixolubo.pdf
    • https://ildiko-szepsegszalon.hu/userfiles/file/zejosurokotazuwutiw.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/183105fb15f0d14011767d0b51a64568/84239594985.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/8f81aaa7317dc536e0952b44a0635d63/90557831182.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/3f229a04a320e092f7706e6a9ad7d503/vonoxow.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a7f37c418---sefatasarabumobivalepat.pdf
    • http://littlepearlspublishing.in/data/eimages/file/11460169851.pdf
    • http://ccforum.kr/uploads/file/1621867632.pdf
    • http://teresachild.com/upload/files/81400821236.pdf
    • http://grupopiscis.com/upload/files/josimejobelonas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a7.bin
1666dca4d28780718443f155f360e46f40a04b502e40151d2f737c56712e538c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 10816 bytes
font_01_sfnt_off0000f16d.bin
cbc0b549ae20dd393cc288ae2049518a0b4b518d9ccf7d6016fa993a8abdfbe7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 16516 bytes
font_02_sfnt_off00011c4f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4F 16792 bytes