Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d97306f310c6bf6…

MALICIOUS

PDF

85.6 KB Created: 2021-09-01 14:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 24026f9ba081207cd6e4b91dea03ff1e SHA-1: 98761ff10dde0f5480440832c4e3e88a45f0adc7 SHA-256: 9d97306f310c6bf6d006e5bd70d6be5a2887e6719a30cc677bec85c33db5b526
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically within the formcraft plugin's file upload directory. This suggests an attempt to host malicious files and lure users into downloading them. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160788a9275e31---51398399408.pdf In PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd348d5dfa---notobunagadajej.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9954631dc---gisirozumomegomasolavib.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/92133272841.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/87495391018.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/54314716934.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/11797212078.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/tobiburowepavuna.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/dupidimadajimopujido.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/19459773746.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/mugik.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/30462786018.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/45928936349.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/mafivepevesubigufigojibi.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/70126759779.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/runonenedaso.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/19804515205.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/xesapesesofolozu.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/xalerej.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/29294593820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=electrolux+rm+4401+service+manualPDF 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_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 19768 bytes
SHA-256: b683cf8bcdc8b22fe2e9080c479b545e09f55978985ad660201149c7fffafe21
font_01_sfnt_off000115f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115F7 10896 bytes
SHA-256: 26ca470bb8dbc6b2e3d3fc35def02d0fbcf813ab4901e4b7cca699b414601604
font_02_sfnt_off00012f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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