Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c379b421d8b0e2…

MALICIOUS

PDF

83.8 KB Created: 2021-09-16 02:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cac67c3d18e7584959563396fcbe546c SHA-1: 440bc7ac2e0c430d30aa14b7646cfd52fef624f9 SHA-256: 90c379b421d8b0e24b119c6be51ba70592f96b81c463dae90c7fb6ed156b6df5
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many of which point to disposable hosting or compromised WordPress sites, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically related to phishing and potentially trojan delivery. The document's structure and heuristic firings align with advance-fee scam lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=dop+2+win+the+match+3+game
    • http://americandeliorder.com/uploads/files/3316939310.pdf
    • http://naturallabs.de/userfiles/file/foxawexolo.pdf
    • http://mnwebdesign.dk/userfiles/file/33187340382.pdf
    • http://webspace.mysdam.net/images/newsletter/files/81087200761.pdf
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210905204438.pdf
    • https://unicon-msk.ru/data/files/futafururetunatanajo.pdf
    • http://rvhifi.cz/files/file/mukururure.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613c033bb8493---xamegode.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd5a96b0f0---16883272990.pdf
    • http://happyorderfood.com/uploads/files/74475515003.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16132f0f3c1f7b---gigotudilubova.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614231e9733dc---11087061893.pdf
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/peboxaximanimagaloxezejo.pdf
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/65782262993.pdf
    • http://gesgo.de/userfiles/file/29044640667.pdf
    • http://www.gulbaharsigorta.com/contentData/file/66210119645.pdf
    • http://bearings-home.com/userfiles/file/30676641290.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ae57b7a62---tekidukakoloxikidafonozun.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614192520ff09---73831842795.pdf
    • https://ubitanduk.com/contents/files/pudekiwagebojonujin.pdf
    • http://importfoodfair.com/userfiles/image/2021/09/file/siresudonurodudifezufup.pdf
    • https://clearpatth.com/userfiles/file/56360512265.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_off0000e168.bin
1a67cccb1b0eabe02d86c4e9995dc2d252c196c35d190f0120eb141c529619d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 18056 bytes
font_01_sfnt_off00011051.bin
ddc889d5a59db5fd6b722398f9a5f3dbe2d875100d10ea651b525c64bd36df47
pdf-font-stream PDF embedded font (sfnt) at offset 0x11051 10884 bytes
font_02_sfnt_off0001297b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1297B 16792 bytes