Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e2bb2d73379945…

MALICIOUS

PDF

96.3 KB Created: 2021-07-09 04:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f015b7a7e69146de481521f26d5f73d SHA-1: af9f3c6bbdde5e76a681997396db30164b2dee4c SHA-256: c9e2bb2d73379945d7ffb5a6d3113f8ad5fb0476a0a7b7d92418d5fb2206d6e6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings indicate it is designed to deceive users into downloading further malicious payloads, likely through social engineering tactics related to prizes or deliveries.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://congtrinhnhaviet.vn/upload/files/89924502870.pdf
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/kimozak.pdf
    • http://hollywoodterrace.org/clients/863344/File/4739511024.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608094673afdb---72447898199.pdf
    • https://whitesal.com/data/images/file/7464_20210517211308.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e4267169b---podozasibi.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609630dd68ec0---44520909003.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/q7pjoin467mn4ksv8sudfn07up/55329537422.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fff2495774---kufuzukakubajejovezisaw.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/35424e61e83894b9021196f63508ee47/24552937376.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160873db7b9df9---30874436519.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607000f6c871d---tisesibaxov.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/woxeladuwodulisatopik.pdf
    • http://jiuxingchaoshi.com/uploads/file/090747315531.pdf
    • https://thefertilizergranulators.com/d/files/bavusesen.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c3f0e981a305c1bb0730b697f853b79a/98530800371.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/fe586abc08c7e28ad4940c351d1710dd/77817490478.pdf
    • http://ecofincas.net/ckfinder/userfiles/files/46605897753.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/ab4d6869edd68d5d9174245260334512/51154461501.pdf
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/42340349119.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=family+matters+rohinton+mistry+pdf+download
    • http://e1pl2.nazwa.pl/busy/fotki/file/18011046269.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_off000113ee.bin
f3b9e5d23852a8fcd59c52a97c5aea95cbf442d62faa393249062e52b1755393		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113EE 17640 bytes
font_01_sfnt_off0001427f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1427F 16792 bytes
font_02_sfnt_off00015a96.bin
bd6c363e91c179595eb21a4a4097ed068a2eabef4773b73d5e752aed4f5b2ddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A96 10940 bytes

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