Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d0a9eaa6cac530…

MALICIOUS

PDF

80.5 KB Created: 2021-08-03 20:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 13789cb28cca885f446632228f03c81a SHA-1: 17e90a58e33a42a08ab4def790b8f2fac27a021c SHA-256: 56d0a9eaa6cac530157dc2aac7c9fd15d4019e91b8bc73488cbab384e7abbf4b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs supports a pattern of directing users to potentially harmful content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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://drafthe.ru/uplcv?utm_term=la+rueda+del+tiempo+carlos+castaneda+pdf+gratis PDF link annotation
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7aafeb0ac2527dc2e11875206b330344/22577635808.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/5c3b3422281f31fe6e5af4a71d766313/98975515921.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160799d0a2d8ee---80766646294.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a45692ee92b---47201329890.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607437195a50e---14099211873.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/xemesazafijobafim.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/fikuzozirabepoved.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/e81e6c732cda8a7ccb21141846fb5a74/verewuduz.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210712221359_18310287.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/wifiduvilidamiruvevabeg.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/26433833125.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/37691974007.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b47c23831aebb056b1eccf300cf84bfa/safexefobib.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1624987735.pdfIn PDF document text
    • http://cy2hand.com/userfiles/4842253764.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/5663548557.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160c9234f31775---wefiniporenajeg.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b8ff509a1---86954763956.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/nojf3a2kopkrh33j9g8lkql923/muzisipi.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/b6e3f7810287aaeb7d902897e4632bf6/wunogedovevijabesajuje.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/fazob.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/228e47864c08a3188d8c195a24231e58/balesowotarizazobije.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160947381ae1ce---74475204945.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef36f09135---zugatanadofiwikarowelifi.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/pisenire.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_off0000d0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F7 18592 bytes
SHA-256: 371fc502761f50432a77e432ca1deb84a9f3f22caa55fc008154ed32666e94ae
font_01_sfnt_off00010074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10074 11020 bytes
SHA-256: a8f41cb5cbaefb3d43e903bf9848ad9fc236031150a7dc2f4b125a0de7c2695c
font_02_sfnt_off000119d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1