Malicious PDF — malware analysis report

Static analysis result for SHA-256 c032866049e081ba…

MALICIOUS

PDF

85.1 KB Created: 2021-09-16 14:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0df171b17ffba16a73043a2a36460c64 SHA-1: 5dffce3b0eeefbaf96ec1adc47a8bbe8793122f3 SHA-256: c032866049e081bae10158f759f12a2da44c86a07d672106816f08ff0a1f5403
196 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as containing an advance-fee scam lure, indicating it is designed to trick users into paying fees for a fake lottery or prize. The document also contains numerous links to external PDFs hosted on various domains, many of which appear to be compromised or disposable, suggesting a distribution mechanism for further malicious content. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ydtmuhendislik.com/ckfinder/userfiles/files/xusavibo.pdf
    • http://besttailor.info/ckfinder/userfiles/files/widurefogebetoligila.pdf
    • http://hcwan.com/userfiles/file/supapon.pdf
    • http://quartierdete.fr/uploads/fckeditor/file/fatofufebamaj.pdf
    • https://shinko-tw.com/UserFiles/file/bidojufipimozofepurilo.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/161402d432a691---57719952723.pdf
    • https://heart-calligraphy.com/uploads/files/202109031155182218.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/boq1lp0pq2ah86lv9tmgg8e5k5/kufef.pdf
    • http://ksklinika.ru/ckfinder/userfiles/files/lopimasituvipomejonugip.pdf
    • https://hijaustabilo.com/contents/files/48314138901.pdf
    • http://www.w.radeton.cz/ckfinder/userfiles/files/49602565123.pdf
    • http://marsalanoleggio.it/userfiles/files/49654136171.pdf
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210912102743.pdf
    • http://popmetre.com/news/files/xuderewuresadutiruboj.pdf
    • http://cerezolorente.com/files/cerezolorente/_repo/file/69524140190.pdf
    • http://xn--80aikni6a0b.xn--p1ai/images/file/6452486390.pdf
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/kinave.pdf
    • https://shreegroupco.com/userfiles/file/zezujetexegano.pdf
    • https://tckontrola.hr/files/49549294171.pdf
    • http://osstemcardiotec.com/files/fckeditor/file/8482837446141be506d2e5.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613912f945621---gudumewabajinizafetukej.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f82e81647---xexalenibafirap.pdf
    • http://musicpark-live.com/userfiles/file/jaguwevopiwiwofaz.pdf
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/37218640201.pdf
    • http://drcleancenter.com/uploads/files/202109161803027605.pdf
    • http://unixsensor.com/uploads/files/202109101804082323.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=marvel+contest+of+champion+mod+apk
    • 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_off0000e2c1.bin
94201c1f80a85fe7cadc6c11c2c43910072e2dfbf4ebc96d0eaae11307de7ae1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C1 18992 bytes
font_01_sfnt_off000114dd.bin
4fa26e1d8edbcb72b38524a599dbed09aa59efec3dad335efc094f11e4df849b
pdf-font-stream PDF embedded font (sfnt) at offset 0x114DD 11036 bytes
font_02_sfnt_off00012e62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E62 16792 bytes