Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16934dc13ebac62…

MALICIOUS

PDF

73.5 KB Created: 2021-07-03 02:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e56704143d436606e276399ac93b4182 SHA-1: def1083169422efab83c43ece7afe542b621ee37 SHA-256: f16934dc13ebac622d0a872b53279c62b5ac85bec3b653917dec28b944400450
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting it's used to distribute further malware or conduct phishing attacks. The presence of multiple PDF link farm heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://crescentcarpets.com/userfiles/file/devife.pdf
    • http://mhinflatable.com/upload/file/ketidegulolu.pdf
    • http://mg001.cn/upload_fck/file/2021-5-18/20210518091439961086.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/29945326481.pdf
    • http://botosani.ro/img/uploads/file/luvebemilabele.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/5500fb7dac16109acb9356f35838a8f7/2087513957.pdf
    • https://rozgarnetwork.com/ckfinder/userfiles/files/gigebopo.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1ce1012f4---99644066074.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080610069b18---70181632157.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7f8fb7628---41979134346.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/t9rvb6mde42vs52cu2e3iaulla/23361382635.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ed1b64a25---61677975899.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b46163e5148---18875834091.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ok7nmr0r0d0a8jkd0tppll9bd7/rabunat.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/hqhi4jfb6m8j2d67v275ngalp7/popifegolusigifizega.pdf
    • https://actor-conseil.com/files/file/mifatebudozap.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077358de853a---puvisudopewakonaxup.pdf
    • http://melly-incendie.fr/img_db/lixibiruvudafadunido.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/4670ada69111cd2c51926c416d5b0500/xafokavenevafu.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/qme8vl09u2jrceih7ehl0adkeu/35616963375.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f87b8cdd---15646415680.pdf
    • http://sistersaviopublicschool.com/userfiles/file/79830683123.pdf
    • http://leakefamilyreunion.com/clients/63964/File/32137850411.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/v2qg15f0s0ojkdsbj5focqcq40/jepatonutuf.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf91120430d---2346684962.pdf
    • https://cldup.com/zr0l_8d9XM.mp3
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=wizkid+ft+future+everytime+mp3+download
    • 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_off0000ba31.bin
3fa265c874ba818b3ed71e337690b513e1ad03c77ae0200db09241bf92b495da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA31 11176 bytes
font_01_sfnt_off0000d469.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD469 16792 bytes
font_02_sfnt_off0000ec7b.bin
270b64777ea2d9c76bac3b53f8635415ed30380fe007a9dec3938fcec8907832		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 16244 bytes

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