Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2195da0c4ce871…

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 13:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 734d25afbc2e787f5bd994059de1405c SHA-1: 2f2a5992564fd7bed0963a696f8e0197808c1f1c SHA-256: 0a2195da0c4ce8710fbffedb54f844e584d3004392349ed6fdd6e7140f480c5c
244 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting it's part of a phishing or malware distribution campaign. The 'ClickFix' heuristic indicates the document actively tries to lure the user into executing commands, likely to download and run a secondary payload. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://albertopizzetti.it/userfiles/files/5074621888.pdf In PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608feb2016642---21293559761.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/xosuxatawifadorotitinozi.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/suligadusabaje.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/zofigi.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/1c75accea91dcfffec7ba4c49906ff51/zebawezagumuvuxiguwowoso.pdfIn PDF document text
    • http://flexa.cz/docs/file/sasumozeneke.pdfIn PDF document text
    • http://yuhongzg.com/d/files/noxop.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/96200264796.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/52393104735.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/71045bb820781c5df6e8dbbe4e9f69de/49916622768.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/f6s2m0ssj9geob9tnnh59lf9l4/vorizavufinamigokevesij.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/75290118990.pdfIn PDF document text
    • http://homeopathyhk.com/files/23796626079.pdfIn PDF document text
    • http://wawa757.com/uploads/files/rewajikiget.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-30/20210730005408565442.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/timakakixal.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f211bd5d87---fazagajilu.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/ef52783e2743966fe53890d226328238/dinilito.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/97207948371.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/dilusi.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/mafejowolakizodibilesugom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=can+i+remove+activate+windows+watermarkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE496 19256 bytes
SHA-256: 467953d11e1326a34e8ddf34f68e81c83c30d58ba581705cd824c47c81e4ddba
font_01_sfnt_off000116be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BE 10760 bytes
SHA-256: 8f45bd1f1f4a773c884c22612dde7f053fc6ab3917473fe36c46dd04306d237a
font_02_sfnt_off00012f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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