Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a3488c5044ff05…

MALICIOUS

PDF

89.8 KB Created: 2021-08-09 22:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ff68c95ab255898991b493116d15808 SHA-1: e3823c9c42fc5b5c4bcf9217f06d05cc5c7cf080 SHA-256: 61a3488c5044ff05df756d4e9c04e31f8a135d127732280dc39c6a3e12b58365
196 Risk Score

Malware Insights

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

The file is a PDF that exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, or parcel deliveries. It contains numerous links to external PDFs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b74183239706a27dccf999641ebb3d06/baleraxukudi.pdf
    • https://bmw-zona.ru/uploads/file/vurowi.pdf
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gotigodi.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ii4fbuhj3rti71gmnaii5gd86o/67193781617.pdf
    • http://mmckno2010.zkosuchdol.info/files/nimipuxoxixetabakugax.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/rg085866su1kg7nmknu2g1csj1/3040846460.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcf5f157e2---14414278877.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/6c56b6aa7ecf575d12d48dbec5f116d9/kuwekobiduravigov.pdf
    • https://cytairtool.com/test/userfiles/file/20210607_a13db.pdf
    • http://mdbim.pl/ubezpiecz/obrazy/file/34626459587.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e49c7e682f---47690835421.pdf
    • https://anjingliar2.com/contents//files/34173647233.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/8e2fdb9a3bac476f7bc7905d909af40f/50999639727.pdf
    • http://sciattella.net/images/file/67218030917.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16088519b84b0e---rosivulipoxirosuxovez.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/212bf4483e49f3e55e98fd57a87b6878/saboxezil.pdf
    • http://biotledlight.com/userfiles/file///ganuduzimudigo.pdf
    • http://studiodebiaggi.eu/userfiles/files/vifuw.pdf
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/48399945606.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6897cae26---24132627869.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af86e035b21---9436639012.pdf
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210808114821.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pandemic+3+hacked+unblocked
    • 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_off0000f758.bin
aee55af55178e51ac3aae1ff5bd0a30491c031317b1b9ac5713f913dfc5435cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF758 18480 bytes
font_01_sfnt_off00012841.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12841 16792 bytes
font_02_sfnt_off00014058.bin
b5890e60e797148bc5a772e605d0a016bf2911637959d9604675aa3a83ff9cee
pdf-font-stream PDF embedded font (sfnt) at offset 0x14058 10772 bytes