Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d3735794070c19…

MALICIOUS

PDF

72.9 KB Created: 2021-09-12 07:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 32838a66cb287d853411f01138c009f5 SHA-1: ddc7e94c3e6cc0bad13461f0bfd5987f3902caa1 SHA-256: 93d3735794070c197a4584e2039eb03cc506d5183322ce4fbf5af92f9b2c0908
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further support the malicious nature of the file, likely serving as a lure for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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 https://crysiq.ru/uplcv?utm_term=live+player+pro+apk PDF link annotation
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/dusegopodipiliv.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/98532267199.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/ledemuzetaboti.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f315b951553d143442d499d36650518d/nanuxezokidotufinosifi.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/16998851152.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613023ad6e32d---45910904546.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/gukaribojag.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/57222214800.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/161302c988f644---pokinozarizukidalepip.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/62793925459.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/16190526057.pdfIn PDF document text
    • http://thewhitmerlawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13765002290.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/javekebomobogazipi.pdfIn PDF document text
    • http://robedecreateur.com/img/files/91935724211.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/98668309434.pdfIn PDF document text
    • https://denimder.org/resimler/files/81735542063.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/76794470104.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/84711503906.pdfIn PDF document text
    • https://sambelteri.com/contents/files/walaxefozasewir.pdfIn PDF document text
    • http://umhouses.com/uploads/files/sovuvenexevamo.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51418498767.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/10038368724.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/57895424346.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210905000753.pdfIn PDF document text
    • 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_off0000ba3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d24d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24D 17344 bytes
SHA-256: 79c0089973ba903a289103fd6705ee015bcfa39b039f0bc9fa25173b7d119210
font_02_sfnt_off0000ff33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 10104 bytes
SHA-256: 0ec27c9ba6a38e73de5b58d95f80ecde810b98680e6f86edd0501694ca6f7559

Open this report in the interactive analyzer, or submit your own file for analysis.