Malicious PDF — malware analysis report

Static analysis result for SHA-256 335d47c004ce0c50…

MALICIOUS

PDF

83.7 KB Created: 2021-03-03 15:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aebbcaeb73ec46d3e9cefdeb02f1532 SHA-1: 7c6c6955fa880b0c2f0f439efa7e010dde2eab8c SHA-256: 335d47c004ce0c50e882b36d60abbd0801d6560351261b124aad46303936ab2f
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an invisible link that directs the user to a suspicious domain, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick the user into downloading a further malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://druttle.ru/wix?keyword=topsy+turvy+planter+tomato
    • http://winoorama.space/lajojengtdl6.pdf
    • https://cdn.sqhk.co/rogokivika/h7iggiA/tolitita.pdf
    • https://cdn.sqhk.co/welosezu/wbhj5gc/koala_bear_slippers.pdf
    • https://cdn-cms.f-static.net/uploads/4490274/normal_5fda63c2dbac7.pdf
    • http://zememor.sportsontheweb.net/65105258896.pdf
    • https://static.s123-cdn-static.com/uploads/4427821/normal_5ffdfe88b3038.pdf
    • http://securitycheckingbrowservkcom.xyz/notary_acknowledgement_formxspyz.pdf
    • https://static.s123-cdn-static.com/uploads/4465387/normal_5fc9cbe23b9e0.pdf
    • https://cdn.sqhk.co/bupewazadufa/jaijt7I/sniper_shot_3d_hack_version.pdf
    • https://cdn.sqhk.co/xipepovivik/cid4gdn/64347541246.pdf
    • https://cdn.sqhk.co/fesoxuleri/gcjjWmf/lisexivusepoteledulara.pdf
    • https://cdn-cms.f-static.net/uploads/4446633/normal_603b7b108c07b.pdf
    • http://glasshookahcatering.com/what_numbers_mean_biblicallyw962e.pdf
    • http://criticcxck.space/mefekuwovinikizawewoxoj4uz.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nowokil/definition_of_first_language_acquisition.pdf
    • https://s3.amazonaws.com/xamapebonijos/sinagasipalasuxexe.pdf
    • https://s3.amazonaws.com/jusuberu/best_pop_songs_2019_playlist.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://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fff6.bin
aad88b533a999087c02816bdd51120d2d8010a8ce75d1d053dbbb047f5358ec3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFFF6 9516 bytes
font_00_sfnt_off0000eecb.bin
9a707cba159ff6cfa0b4b9a3addf5735f8a25178d2aaa5c818990df874472a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEECB 5076 bytes
font_02_sfnt_off00011add.bin
c673826b380e615ded1b072241eeb54e442c87eea9d1c83808f7834b13673b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADD 11172 bytes

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