Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0472c235d4da9f…

MALICIOUS

PDF

209.3 KB Created: 2021-06-28 04:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8465c55fce5cfd4d0072495357117f6 SHA-1: 7c72d4e372789c4c2337708592c3a3844f48adc0 SHA-256: 9f0472c235d4da9fcf49396f0a9d5c994ccb4c25833f776ec5dd295f43a4aa88
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, likely intended to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous compromised CMS upload links suggests a pattern of hosting malicious files on vulnerable web servers.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9852

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://artpolinakuzina.ru/pict/file/47677653029.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608693b6f3e1d---91372141691.pdf
    • http://woodwork.pl/ubezpiecz/obrazy/file/96170686533.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d469cdaaf05---57928342066.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/0e8646002d93cb85f39a9a4564862557/gejunifipiwom.pdf
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70589626873.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f050a7db98---99397363680.pdf
    • https://makiriaszto.hu/ckfinder/userfiles/files/jodelawubepagudalux.pdf
    • http://simonide.org/userfiles/file/71501470528.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e92e43b33---rowozewuxujibafata.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/dbrelpathdekgmtoilqr09eju3/2381190099.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aec1047368---26981333157.pdf
    • http://kuhomania.ru/ckfinder/userfiles/files/siwavotifufosuk.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6efeeac47---kuzuvodililu.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607031dfb7eef---93798739954.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160d02c8c29af5---dojojegezoralirelu.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/cbjfr1gdbqmh24dbaagfql2sb6/diwifekivurivajapufiru.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f60251620e9f0fc1279d27ef5b2691f5/jikivo.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/g16n7pdvjsd0esdpokrm7akpk5/zozutejanirame.pdf
    • http://magyaringatlanadatbazis.hu/dev/_user/file/bafanem.pdf
    • http://asesorgubernamental.com/images/file/wakopazisej.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729370613d1---41561934671.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/6a36586430a956022ce09bf737789462/13756462628.pdf
    • http://china-hold.com/UploadFile/file/20210531080013698.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/c18f5cfa108a568d72af518657c2b5b2/xewibebigamak.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=comedic+monologues+from+published+plays
    • 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_off0002d562.bin
d1273c438768e858c99d8ed7c74bd2de244e68fbe9868c2a8d8aaab2292e5569
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D562 11352 bytes
font_01_sfnt_off0002ef7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF7C 16792 bytes
font_02_sfnt_off0003078e.bin
7cd1cba2c39ece3ad838ff3653c0d333e65ebb3e6f1537412d3645e9ccc42d7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x3078E 18384 bytes