Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc32b29b73b19011…

MALICIOUS

PDF

87.7 KB Created: 2021-07-07 06:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfda143a5de93108232f29577c30f62a SHA-1: daa219abda5d3e20af443fa667378d6959f711be SHA-256: bc32b29b73b1901108f560158697e5dffdb86a01ad1e69ce24978ebe3b5c1205
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL heuristics and AV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://lightningriskassessment.com/ci/userfiles/files/27556283180.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3aad58fb9---tivej.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/858d9cd5ba85ad254f1c6a4c20b52481/dilunazalogedaxojozuwer.pdf
    • http://myucpb.net/userfiles/file/rifejurebezudedi.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a613dd6e216---sevud.pdf
    • https://penzionradvanice.cz/res/file/2306688736.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1606f961c9dc6f---fukugulezozu.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/andevjq47lh91r8l4bvq7uqar5/36672532458.pdf
    • http://bptramptour.pl/files/file/66440684287.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16081ccc19ab22---mavizajukazigexusidep.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160832be2836c7---62737299447.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/286148f0ba064230951b27b8aa16304d/12833051211.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/9348a8de568e02726305a16b58b0b7fb/lakudogog.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca9bf639910---dipezopivegupuzerikubek.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/8ae96db8cf653f79c21b88c879bb27aa/383336531.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947be2ad587---23489629288.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/1610159406.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bed9b1e711---44444415725.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/e36897897c4ee997a39855db6a118e5a/25758607661.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/6231af0948d6608840eca48938976d16/5061765082.pdf
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/78142034076.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bafbb250e---nezisorexomugakul.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/2do9acpcof3b7tn70mpfg58tei/mukosojikumodimu.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/ab00b38a08bbfffacc2c2b577dc098b1/filepunemiluresut.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=rainbow+six+siege+tips+for+beginners
    • 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_off0000f29a.bin
b1d356cc8ea0e4b2bc8429f713cd69b43bc9b01698aa030dfc781234f20fc2e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 10860 bytes
font_01_sfnt_off00010bc2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 16792 bytes
font_02_sfnt_off000123d4.bin
200d432d12f6d6db4cb3b8bf3fa49e1b2fba2f54c722ffff8dc68b69cbd2b562
pdf-font-stream PDF embedded font (sfnt) at offset 0x123D4 17264 bytes