Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22c36ee5eff5f89…

MALICIOUS

PDF

88.5 KB Created: 2021-07-24 20:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3e0f845184d34924c6f0b8814a5698ed SHA-1: deab08f19f06ebdd6e34f9f5aa9fc8b49f74d916 SHA-256: f22c36ee5eff5f892b6338a51dd6182dbad09b765b7794d61bcc33cbaa196d2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or redirection scheme. The presence of embedded URLs and the overall structure strongly indicate an attempt to direct users to malicious external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://absolutelyneon.com/userfiles/file/86012641556.pdf In PDF document text
    • http://casier-a-bouteilles.com/file/dazipujulalagunogu.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1fe2361a9---wodoburesufikozo.pdfIn PDF document text
    • http://jhroseclassof77.com/clients/45984/File/gofaxofezanuturanijagep.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f6ee8a2ac---14057463120.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/6d436bf185ab62168c9919223951c804/jivone.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c16617836---75963340952.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/dekowevefosazagezek.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/5de4a3766ee6d862c512717229c44adf/81824112527.pdfIn PDF document text
    • https://hgb.se/filer/file/85545380020.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/f7339fc22b96969341c3a157485575e7/kinegalawegikar.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/72059111941.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c00b951be38---vojevunatenisijetoz.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/b76d38e1a1211c5747ea242b2a05d746/fekeji.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/24689409418.pdfIn PDF document text
    • https://masukpt2.com/contents//files/nemosajojurotifuse.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/jifawe.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/vepoluwixusuwajo.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/6c03dbf0dcea5acd61315f8805980d9f/13203182519.pdfIn PDF document text
    • https://birutelorasin.com/contents//files/xeremokos.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1606d50c330a41---tidasapifomuj.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/bakidux.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/zavinodibugosezunemol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+change+edger+blade+on+echo+pas+225PDF 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_off0000ee17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE17 20036 bytes
SHA-256: 5da56028a45180013fb362569f53cfa4c92adcf05a91a0961956a852d4e7729e
font_01_sfnt_off0001219e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219E 11172 bytes
SHA-256: 9b8bd316c32c430dcf520ec3be118b59723648959ae2669aae7a19d185b66331
font_02_sfnt_off00013b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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