Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e885e00269b14a…

MALICIOUS

PDF

89.1 KB Created: 2021-06-29 01:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d94b1d42ac8becd7996376050fd7ba8d SHA-1: d2c09c336e1154857f285ff9c00af3158127c394 SHA-256: 36e885e00269b14a694521cd0f19e961929347cb1ca3e49548e4e2a8077d260f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable. These links likely serve to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://nhaccugiare24h.com/uploads/userfiles/file/lunexawisusemuwurokex.pdf
    • http://esoftland.com/userfiles/file/roxulutezosozi.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/dtpju75r0p3n046r9pl9o1jhn4/lavatit.pdf
    • http://gourmethousemacau.com/UploadFilesfile///joxuzebux.pdf
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/17647750346.pdf
    • http://sosnovgeo.ru/userfiles/file/xonivujoda.pdf
    • http://fdscience.com/UPFILE/userfiles/files/72738258893.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59521e9817---tutelamiparokadixugomazu.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad94eb9c033---48454670312.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/e70c5ac10a0128a8c56b4009b10f4605/65681199718.pdf
    • http://akcjonariusz.com/UserFiles/file/55414701891.pdf
    • http://vmkmsz.hu/userfiles/file/xelixaxifezopevan.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cea51251d6---tetiwabivimefokutivumomim.pdf
    • https://llibreriaha.com/img/events/file/98898816810.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f86d15868---41902371425.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090542358aa6---28005728349.pdf
    • http://nebovsem.ru/app/webroot/files/files/giram.pdf
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/70926868146.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/td9v2lh476n5vms5tnbjq80tt4/79909794895.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074515715ba9---1539662756.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607277fe6a0ee---59368922849.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae299e89373---xelelapaluradosigeso.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb2d9423e8---26148511017.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ed6gvjf74cske3mcsnencslhi1/fipes.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c718ac8ac02---xikaposi.pdf
    • https://akproauto.com/nbloom/fckuploads/file/zuponulokusu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=coming+out+on
    • 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_off0000fd65.bin
5eaaa4614dcd31d505a6f57c3e5c6f338fdca7463316c8c3f07d4dcc94371f2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 16920 bytes
font_01_sfnt_off0001295b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1295B 16792 bytes
font_02_sfnt_off00014171.bin
27aa48953fb4d2eb749ba1d7b48854a3bd0c12084e05ac15e7a9738ce60fbc7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14171 9976 bytes