Malicious PDF — malware analysis report

Static analysis result for SHA-256 802abca78db137fb…

MALICIOUS

PDF

97.3 KB Created: 2021-08-05 08:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f88e2c8a743f97c68565db56832e4643 SHA-1: 5687fb95430c5d7dcd7d1e8ab9a87d51318e93e1 SHA-256: 802abca78db137fb07710f4a42e7df42cd22109ce99d50a5ef218d8619c9f2ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or redirection mechanism. The presence of external URIs and link farms indicates an attempt to direct users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d760c9a2414---75187204502.pdf In PDF document text
    • http://hotelclinton.it/userfiles/files/zorin.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/71099889400.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/6423273349.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/timawokunisixav.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077b241a4466---96206225781.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/b0a655f393b86a45094732cdf1b0ef70/jifonotekeliveniwimeberov.pdfIn PDF document text
    • http://cartopack.com/Images/file/woxusom.pdfIn PDF document text
    • https://tsegypt.com/file/sagojusonefixa.pdfIn PDF document text
    • http://metallpress.ru/files/mijur.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/91014042802.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160860ee6265d0---1413685606.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/pujotopomerefur.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/72b41d88f21fcf58acd282d44cf3d484/18403950185.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/3rmo2jvbsvs62ubbkfm7j45nseo80o8j/fozubugesarubuloto.pdfIn PDF document text
    • http://zenithmetals.com/files/nubebozudigaxexevofunat.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/53294787577.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/81287780893.pdfIn PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/gefalubedofes.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/42949912162.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/fb014ee5dfd30751b869369418c7f8c8/rivadimuzekizodi.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/sh3hpm2k2i6lk7416rlnlp8bfs/91997916839.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160725e7bc4b8a---tuxefekonojamuravojokal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=chemistry+stoichiometry+worksheet+mass+mass+answer+keyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 19152 bytes
SHA-256: 4eef0a3efed92556a7063b7100f88bae14a94d4d98eebe5843399ba773fda802
font_01_sfnt_off00012dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAB 16120 bytes
SHA-256: 09562ca2d5000ae2f2345c4ffb282664df80e6add20478162cc85c395b82892d
font_02_sfnt_off00014303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14303 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B1A 10772 bytes
SHA-256: 320a309214dd445d54a74ed51a77a1b5dafd37b6a58a6f065cd25413a7b2a6b5

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