Malicious PDF — malware analysis report

Static analysis result for SHA-256 54333976c13e246c…

MALICIOUS

PDF

92.2 KB Created: 2021-07-02 08:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6fbeebab548726a4e68cff3c8565446a SHA-1: 5ba05c60306e6dff9f131fe5a2dd8ea0ed81a607 SHA-256: 54333976c13e246c4cd6aadc2db6769c2e98938fe92ff53b2e811079c2ce28b9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/7bc8ee36adcc2922b045a80282152e22/zadazavupes.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/cdca5a3b82b3f32321ab921da91fbf32/76339543310.pdf
    • http://mjsolankifoundation.com/fck/imagesfile/tudasafaluzagepowelorito.pdf
    • http://alanurturizm.com/rsm/files/mugopesiwave.pdf
    • http://adacu.org/userfiles/file/20210624124722.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607364f7e05f0---giromilawemavudalax.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2dc9de47818960c0d39f9f662f8d3cef/43962163974.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9e1b52c41---97302221072.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/c867df1ea6d915ec9cd897bd3224724c/duvetomupadubuga.pdf
    • https://audreyheselmans.com/_files/file/winitimirubotivilaxe.pdf
    • http://asfus.net/virgsurv/userfiles/file/govovowifizereref.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a467442568---xuzobologumu.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/8504ece74307ca52afb692c298e971ca/23805093038.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824b33d6e8a---bimizemavimulirunonanori.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab8fba7d5---17757589355.pdf
    • https://rajaunited.com/contents//files/fiwowejapavomuv.pdf
    • http://bulongvungtau.com/media/ftp/file/napefazemer.pdf
    • http://duszek-lasu.pl/userfiles/file/28987261541.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743356eb829---zemekufokuzaz.pdf
    • http://sumnerclassof1976.com/clients/4/49/49b54eafcc86ae0c30eb104ab8b91c7c/File/fusegenutanupokovijepuwe.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/451a0bfa45f8e4125d7b561969e33aa1/dexobakupepo.pdf
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/7574023763.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=human+geography+pdf+notes
    • 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_off000105ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 16792 bytes
font_01_sfnt_off00011dcc.bin
9a74547fa4772ded3a177034901aa5ad965dcad8449bc5d78b49b56252e2104a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 17220 bytes
font_02_sfnt_off00014a93.bin
452bdc8aa80e3b81d2be9a60c339a9a99aa947056c162ae63bdc6e2ebfcc2fb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A93 11012 bytes