Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a02f49527ac6f11…

MALICIOUS

PDF

88.1 KB Created: 2021-07-03 18:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4477bf8916c7bfbd16b3e9bfa40687c SHA-1: f057a5b1d303ad3c5dcebfb422ebf7004cc2a4ce SHA-256: 3a02f49527ac6f116aa5a0352230624af86a2cd62e3e10018edbf619be2810cb
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a lure for remote-support tools, which is a high-risk tactic when unsolicited. The document also functions as a link farm, directing users to various compromised WordPress sites and potentially disposable hosting, suggesting an attempt to distribute further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/dc97f0f02659c6eb28c19fa83c2c3e49/56036760422.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/420f0758930da14d166ed47180615db1/59167323416.pdf
    • http://martonelektro.hu/files/file/lekedopixigonazo.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/uhj9dh6h6tanjadctmkrfbl0f4/95754656935.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071897c5f096---dirolesazizore.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2915f6af55---12379962724.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/ecubhd7iq1c7ebacgt00j2vmu7/vuwuzadiligolowepitat.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/da4ed0f6646f70bbccec9e9b0a8ce1c0/dobalafejegipig.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a945989524---6543676840.pdf
    • https://mumegram.com/userfiles/file/40778772113.pdf
    • https://poolpoint.be/uploads/file/munisazefoweg.pdf
    • http://thsport.dk/ckfinder/userfiles/files/10507330425.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ea83bc36d---jajinujizonovuraler.pdf
    • http://kfnmdg.com/upfolder/e/files/20210623170058.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fc19accc8---lobovemobeb.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160862ff57ff53---fomanameruveg.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d46da54d52---labowopogofivojagexa.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bee93074a5e---losutojimekonarinobupiriw.pdf
    • http://www.deopendeur.org/imgUser/file/tesarosiza.pdf
    • http://bonsaichik.ru/images_uploads/files/80488417725.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609939cf89aff---68366181148.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/14212295110.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7c64ce3f0---moresakupamotitivabunosi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+basketball+diaries+watch+online
    • 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_off0000f39b.bin
39595c6e88c181bc418e15264216bd79ac0a998aa594d5ae1356ff9ba32845c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF39B 10748 bytes
font_01_sfnt_off00010c5b.bin
1f0a0dcdfd992f1e402cf24f655e79345f8ddeb83945742893b830507a98d864
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5B 17832 bytes
font_02_sfnt_off00013b1c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1C 16792 bytes