Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e956eea9a2245e…

MALICIOUS

PDF

86.1 KB Created: 2021-08-18 05:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 32b195f5ce721ab2f80b4feb620f9345 SHA-1: 0cd431a0ec7475bd28f2d556165c73216c22e228 SHA-256: f7e956eea9a2245ed9bd277954f7dc983ec93d6790b0e962391a584ea6485961
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a ML classifier and ClamAV. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as a lure to download further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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
  • 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://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16096e29b10c03---53124993268.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2ea2c59ec---gamexujavetopabe.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/1631d3d1a2fc086a993b9bd73e64f959/siwabolejibemajukotadu.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf6d1f264e---mutafokusuwilarolezuxem.pdf
    • http://biomehl.com/images/content/files/46069056240.pdf
    • http://elverum-revmatiker.no/images/file/50574519053.pdf
    • https://hobbes-group.com/upload/files/67225744836.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/badiwixakev.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/962c2cf0a708ed7c7d59b6c1906db009/fisixomixopiwomupeku.pdf
    • http://xn--9w3b11kh5l.com/ckupload/files/viwawugafolobinajiz.pdf
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/69317312730.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/arvhtdjg85khahcfgjkne7rr06/95130814782.pdf
    • https://e-uchebnici.com/img/file/xosukunuzeni.pdf
    • http://www.pzkexie.com/up_files/file/70001957479.pdf
    • http://ifa-astrologie.de/userfiles/file/benugefupararufobevubego.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074dc2a0e0ab---38319523767.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae10499f324---vekuragi.pdf
    • http://thamdinhgiadaiquang.com/img/files/71374321725.pdf
    • http://cementfeet.com/userfiles/file/venamazojevanogi.pdf
    • https://hondaotohaiphong.vn/upload/files/84067559205.pdf
    • http://koszyczarek.pl/userfiles/file/foziwapo.pdf
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bolewonizovupokukibisupez.pdf
    • http://paitoonbox.com/userfiles/files/lidebenizubefog.pdf
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jamubufal.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=jamb+past+question+and+answer+on+literature+in+english+2019
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87a.bin
dcc25cf5fefd3daaf83f75073bdbfb78589c20dad8e2a2d23ab3cd0c4d9c9b9e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 17840 bytes
font_01_sfnt_off000116a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x116A5 16792 bytes
font_02_sfnt_off00012ebc.bin
870c47704dae05be144c5c0073bad67ab4f8cf50d2fddc2bdd6a6394eac81a4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBC 11764 bytes