Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68ed939d1d6971f…

MALICIOUS

PDF

119.5 KB Created: 2021-06-28 22:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56b16b128a0e90e817c102e1d58e2ee4 SHA-1: c086dde2f98b5a7a066aa97f36eb386712aea57e SHA-256: f68ed939d1d6971f0f2b11db8232de7c9f58df0a7849e30111e2184139e54164
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/3aaafc27ae8c72ca7098a7bbca60fd59/33058248202.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba839d46453---sosomowinirojifewolofa.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d2af610d9---4885524540.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31d84e485b---waloli.pdf
    • http://bajajsports.com/userfiles/file/jubinonidini.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddeaf097f6---masosebifulafo.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/arprusqo1ahm6cnhn9ouvsp0b3/2041441574.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089f0e3c73f3---wejipojerezubewalekeda.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084a494bf665---bomevagaguvasojazezu.pdf
    • http://whitefamilyreunion2020.org/clients/4/4c/4c64578d40ee165aaf486c9a1ef3309b/File/76315558734.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccba4dcb57---35295387190.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d8c9fb3ad7b4c3aa8959b0acb136cdd1/jisotodimu.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6ba28003a---mapekavis.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9df8b45ae---lesejedoku.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dd7396fb2---padawidujabakuzojusejonij.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/2dc4608c88067da728d2cbd008b7014d/51078943664.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef3aea182e---rupebanosigujizugaf.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11dead003e---10360648786.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44c52c4b9---vijadowel.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608445f0604fc---xusoz.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad203f9e17a---nowefezanagageva.pdf
    • http://dekoblickfang.de/userfiles/file/67094984003.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608379d79d5f4---katapumodek.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=collaborating+and+partnering
    • 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_off0001732c.bin
324c8c3bde8a37ee91c28453118288e04ba18fb7e46c03cce4353037810fe685
pdf-font-stream PDF embedded font (sfnt) at offset 0x1732C 10568 bytes
font_01_sfnt_off00018af1.bin
169e334405b4f54055ca39c647ab81814e55a0087b9d49bc2ab81c3fb31313d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x18AF1 17936 bytes
font_02_sfnt_off0001b893.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B893 16792 bytes