Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95b6e41ecc4a39c…

MALICIOUS

PDF

87.8 KB Created: 2021-07-01 14:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac50909705c05c69ff1939d7ff8d6354 SHA-1: b1e322f05e6935781e7a6fb41ad5bd3e8c5f14d0 SHA-256: d95b6e41ecc4a39c2ccf9abcea134974d084f2f9c1f3768a3c9b388499e76a87
196 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV, and exhibits characteristics of an advance-fee scam lure. It contains numerous links to external PDFs hosted on compromised WordPress sites and disposable domains, suggesting a link farm designed to distribute malicious content. The primary purpose appears to be directing users to download further malicious payloads through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://apexhealthnutrition.com/newerac2c/userfiles/file/tubuziwifiboxonowozimu.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aff37c20fa9---fonedonilopegi.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c15639afc12---nefagajikuzekagevu.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/79fc3bdc2dad46dca3ee72bfab96bd17/gufunuxisim.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4880c4cb3a---xameparegofovot.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d193a7e43c4---sesadutixi.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/201241692.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d07e39ce0c---jevasagegoradijikev.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf339e8d1d---67716449049.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160833d0f9e75b---kajosewabamufama.pdf
    • https://dagvandearchitectuur.be/_files/file/dojitanex.pdf
    • http://atonoserver.com/userfiles/file/nidaziz.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/c9blbn6p3i28oc75uagnn3k3u1/tujajupezetiloxitetofege.pdf
    • https://anfauglir.com/images/file/sakipurimojaf.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbafc2d8fc---wipexilo.pdf
    • http://tara77.com/clients/46590/File/bubexakipujinaf.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee6ce78cc9---7129485474.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607da9b77edeb---wafafekuvogipusid.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b684cad71f---jonekukugamukoki.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778da25f2c0---61061913668.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbbaa44ac9---nimokiwefudagubufiwuvuzi.pdf
    • http://crystalcleanwindowsmn.com/clients/c/cc/cc5f591ab25ef7bbd7a205b431f39e57/File/28981269369.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/d1a66736b90329a8869d08738bf9c79d/6390996518.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/34a975b0655ff9088d22fa330fa79dcd/nupulujeb.pdf
    • http://yakutiaprime.ru/SITE/files/editor/file/vepuzufijaxusogumugi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=principles+and+applications+of+electrical+engineering+6th+edition+solutions+pdf
    • 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_off0000ee53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 16792 bytes
font_01_sfnt_off00010665.bin
6dcd2962106cdbda17db1248e75ffef0260f5af056dec982dd590042f80e621b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10665 17772 bytes
font_02_sfnt_off0001350e.bin
cb145db1f43d766692714099390e07c1148c9a80705cd90e65274e528a519b98
pdf-font-stream PDF embedded font (sfnt) at offset 0x1350E 11168 bytes