Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfcf2f580ed7744d…

MALICIOUS

PDF

81.6 KB Created: 2021-09-01 00:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bab0f77b46975f7c9cf4484daa82ea9 SHA-1: 6c198e67535d1ecdf2556bb547cfef2cb28e1f03 SHA-256: dfcf2f580ed7744dabb5f79f9c8e5bd5098455d057d4550422cc8751c56dca41
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of urgency lures further supports a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jgranit.pl/userfiles/file/76825034630.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112065df192e---52500618879.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/51ueskm6v6oov7r70mmkpbglv2/40704437411.pdf
    • https://vibanghanoi.com/uploads/files/semerekixunigefasiro.pdf
    • https://sarna-zapiekanki.pl/ckfinder/userfiles/files/15034810204.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/71e3d0f7134a9dca5e49777a0e6aa985/16527804853.pdf
    • http://morecoredesign.com/images/imageUps/files/64430950507.pdf
    • https://fanaf.comarticle_ressources/file/daredog.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/kso03pp8dqq5uo3f1488t93o35/54827524096.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/8c8292f30f5093ccbce473409498a349/jinepikul.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2ac9e834d---xikuseguruta.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f936c59914---jozutisojelujuzetulota.pdf
    • http://www.urbanwaterways.info/files/rakimikevuneneluno.pdf
    • http://emannsltd.com/userfiles/guzixanowakujujaleziva.pdf
    • http://zuche0551.com/upload/file/darivuke.pdf
    • http://novelinternationalschool.com/ckfinder/userfiles/files/80259275015.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/1jot5rgtmh991vro2oue2b2sek/segapuwojajujazoxobi.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/3f30gji4hhmghgaske4e0v49q0/remarimesiperudenawowuf.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108512d7a6e5---vizaxoziwobuvabi.pdf
    • https://www.htlexpress.com/ckfinder/userfiles/files/xawupus.pdf
    • http://cnkls.com/userfiles/file/1625229786.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=blood+in+dysentery
    • 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_off0000dd2f.bin
dedc29788ff72cdcc4b1db8aa092cd048744a39cd601cd074bb07734c0157f37
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 17124 bytes
font_01_sfnt_off000109a7.bin
c71668605f73d5d678e986b6dd8cc7c574c6e9075f5d8d9a37d00b660c5e73b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x109A7 10244 bytes
font_02_sfnt_off000120d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D4 16792 bytes