Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07a15f0bdec2fed…

MALICIOUS

PDF

83.4 KB Created: 2021-07-31 09:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: adb6728f49079ef9d5d7577e197e5740 SHA-1: 8f50d74da5e24a0bec76bc3763b324f994c831d2 SHA-256: a07a15f0bdec2fedae36e10e1191004ab03378af475db1223b6b4103052faa6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://oniceh.ru/uplcv?utm_term=gita+press+bhagavad+gita+gujarati+pdf+download PDF link annotation
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b21a0c643---53675889712.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/tebunaxub.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/58777083988.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/524ddc6c1e3f458ca37e99d2019410ba/tevubelezaxuto.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/gewixemobozutowedoxar.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e6a1a102c---lumijogataxon.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/63286359670.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/kifozuzupidilizibu.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7d5862fa---tosakuwubufujaxube.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://hephatha100.com/clients/4/45/452f9a9cd3514f90eb92b3b4734a1f1d/File/71441842214.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/44082816020.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/67853204760.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/wafurozezoxulatutafuxix.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/mazozakuxubukidi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/on0ch6g0auqa5mehpetn0lcm70/rixanafijeno.pdfIn PDF document text
    • https://tekartltd.com/upload/files/72062325593.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f5deed81bf8---wuzukakunapove.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160867ad59e951---48696340340.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/gaxiganufuwo.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/11637989651.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/rb0i0hcf3ucr5ic6h0n847v4dl/fovilifis.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/79527945854.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/bb95a53c0a02fc3a1d809d5788765668/zujubobo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB22 11340 bytes
SHA-256: fdf9c97d5d60efd66a5991e9ffabd78f550458ce99620213bd27cac4d7e6f530
font_01_sfnt_off0000e562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 16172 bytes
SHA-256: 637a9dac0afc585f1f105c2de408df99420c2eea19216aca5c902ef31b2be0e3
font_02_sfnt_off0000fafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFA 16044 bytes
SHA-256: 5ecb351c64ca85c1223bda353d2187f6da67d14c863f7f4bdac4e767708654f7
font_03_sfnt_off0001248f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1