Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf00ec9d3a09bb2…

MALICIOUS

PDF

101.9 KB Created: 2021-06-30 08:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89f95cf603ba9d355451ef56e25b6cfe SHA-1: 168e8e1bef17f2b8b55516dd1555c790b214e669 SHA-256: bcf00ec9d3a09bb217271979dbee65135c3b5fd7f995fb2070cc55f99653d721
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external links and the high detection scores point to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/ccd5bda7d4db3dd1011591a9c5e511de/83639276579.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607806c66667f---12680178427.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079e1437857b---zirikuzixarep.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609650d102c4c---gasimavemudibego.pdf
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/83858852829.pdf
    • http://penzion-u-zamku.cz/files/file/rejuzidoxowo.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/sbboj209jm9658jml5akinre46/makewipewag.pdf
    • https://micro-churches.net/uploads/file/2366286741.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/d628188c92d2d5beff32651c0c3a6cc9/31809417939.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089589e79f09---jixupuladabi.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/7111a6f049a8fb388e6684f0c820d87c/dosatet.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/c105ef0aa8eb7186119023982a88dfff/34838955999.pdf
    • https://pearproperties.in/userfiles/file/5519700111.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68bad19858---tasawigetapokima.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/f5c5e62258e5a31cf5ffc5479646cf9e/rororeban.pdf
    • https://egyiksem.hu/uploads/file/79697865257.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160c079c8ec23e---58089564535.pdf
    • http://usarsenal.it/userfiles/files/weborakanazimipadawukav.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a324ec7003d---35941443613.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24f555873---55011081992.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086094947235---zobipalekub.pdf
    • http://seyrimerdin.com/userfiles/file/jeborezabopu.pdf
    • http://sparkpro.lv/content/file/rezatubemitimakekekutixo.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/2839517288bd93909963cc4adc9a8bff/28502019258.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=mexican+stewed+beef
    • 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_off00012686.bin
ae271598dd166f991a3a76bcc9f183a5b42419c60f1ff4f9a5612ae7eea92a1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12686 19760 bytes
font_01_sfnt_off00015a6e.bin
1e917833eec6cc67b18425c54578e4f77c3f7cb45b32ba964b9eac55371e6f10
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6E 10524 bytes
font_02_sfnt_off000172a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x172A1 16792 bytes