Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b87b22dfa32ccd…

MALICIOUS

PDF

78.2 KB Created: 2021-06-28 16:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b923ccf34b8208d726f2c6612dc691ad SHA-1: 59c624d331013fb60480d9d702592068e8fc8225 SHA-256: 03b87b22dfa32ccd049730b5e58594b8cd72d0e872457e998d58e31a0e6a8bda
196 Risk Score

Malware Insights

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

This PDF document is identified as a malicious phishing and advance-fee scam lure. It contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to distributing further malware or defrauding users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/9f9670a2815d22a27f0e87254eae92fe/87759865806.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/eddaf23de17bf658a7a06a1dd817b2eb/57035521321.pdf
    • http://ingatlantv.tv/userfiles/files/21589255614.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/15124d026724e12aa666203a22a16e7c/jexokowowonomolimuferebes.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/43738b748b84dac08d09d63354e85713/52155014052.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160712cc9667b9---64886247461.pdf
    • https://akproauto.net/nbloom/fckuploads/file/98469730718.pdf
    • http://change4best.ru/upload/file/noliredijusade.pdf
    • http://starwindows.ie/ckfinder/userfiles/files/jigogekugufedesovu.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/b16uc058qk6p67ijmv8rrcngcb/49592047952.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/85405820610.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa674ae462e---95644523730.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609842fe5c5f1---gepinafewutozumelalaniz.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2851a79d9a---tajavisedupapibirid.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/3df516995bbc02e24ee3690902c78f3b/16151660419.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/u03cein98u894dmdnqm50ingt6/xesawotuloxaxofoxi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082187fc4966---derini.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160783ee946eeb---pobitiwejonidejirozegibog.pdf
    • http://bjbtrh.com/files/pic/file/koxomasapelos.pdf
    • http://www.ferm-matic.fr/upload/file/fivuj.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16091e6efd70d6---38432587851.pdf
    • http://deltools.com/userfiles/file/bumarijugu.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/bnti8egcnv4fkg01kei0qtqeup/51867787774.pdf
    • http://come2menorca.com/images/file/zevabe.pdf
    • http://czapla-dachy.pl/public/images/fck/file/85172093052.pdf
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/5247481896.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=valentine+day+free+images+download
    • 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_off0000cbf5.bin
467e735424e2de09f7c350558d9085a12b47a9f2397552f001897866e0eb5045
pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 10868 bytes
font_01_sfnt_off0000e4e8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 16792 bytes
font_02_sfnt_off0000fcfa.bin
02bdd645950c4e168b46d8e8fd30c3bf46f998d291a9309ee1b02207d4aa2fdc
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 17676 bytes