Malicious PDF — malware analysis report

Static analysis result for SHA-256 863cd7bc57eaf7ee…

MALICIOUS

PDF

101.2 KB Created: 2021-07-21 14:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8802479156c06e90fe48f84c38f021b4 SHA-1: b03de55e2b4c46eaeb9cae4aaad958cfd71c3337 SHA-256: 863cd7bc57eaf7eecd211836a8a3137584f4a0db38727acbfcbbfbfbee69cea9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, characteristic of a link farm. The primary purpose appears to be directing users to potentially malicious external sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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 http://pizzeria-millemiglia.de/app/webroot/img/editor/file/zajagejerena.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609204de2f056---3400407859.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e763693d328---fosogaratovajo.pdf
    • https://rumputhijau.com/contents//files/zexilovanezozidimipe.pdf
    • http://perles-del-beya.com/userfiles/file/35205684317.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/somokivevuxebuf.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/37100a3e0c3e263d48af912e0428dd4c/77798262154.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07bebe40e4---68286940828.pdf
    • http://podlahypilat.cz/admin/file/53725578757.pdf
    • https://abhimaninteriors.com/ckfinder/userfiles/files/77330608495.pdf
    • http://www.kickcommerce.com/userfiles/file/sududajiwusinuduni.pdf
    • http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/98072944105.pdf
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/rm7jq4nu8ho7qbif34m76qvpa9/weterupuxiwesozepoxavuzog.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c3b73votcdhn2cukkq532rp56/97831359847.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d7be1c62c---94790421923.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a940046e402---7906599482.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/ch6ktbe00lhe4tk8olq8d75j0u/repemadeka.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3136b35fb65c3bcbfddc2ee6192fc546/22116289780.pdf
    • http://kibbkw.com/uploads/file/weriturowepugojifukafakar.pdf
    • https://temahr.hr/files/wukefivupetaraki.pdf
    • http://daimarconstrucciones.com/images/admin/file/88283295288.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/cc0tgd2iidia31b29repsbrv93/22253254139.pdf
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/zujevimenilejelagux.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+get+charizard+in+pokemon+shield
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb8f.bin
771519ca146d752767d8b496eb2f69791b7fe2e48d6e473359ec6beab85b23b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 17416 bytes
font_01_sfnt_off00012949.bin
97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd
pdf-font-stream PDF embedded font (sfnt) at offset 0x12949 16192 bytes
font_02_sfnt_off00013ed5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED5 16792 bytes
font_03_sfnt_off000156ec.bin
8800ec0534024519cc04b945766a1a4f48a45d5f002a4092faca1013445598e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x156EC 11188 bytes
font_04_sfnt_off000170bb.bin
b7cf50b49a5f9bb44810b89cf7b6ef759faf657b2e7dea5e1ee60fc014b5b5da
pdf-font-stream PDF embedded font (sfnt) at offset 0x170BB 5940 bytes