Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f3d5945a73e428…

MALICIOUS

PDF

92.0 KB Created: 2021-03-20 13:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ef8b57e6da111c5eee776849eae6407 SHA-1: 4289549146889ce8c8d1384c044fff6680a82d3e SHA-256: c6f3d5945a73e4282edf85c4e1b49d174617327bfb30052c358820c510749aa7
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though truncated, suggests a lure related to 'claim evidence reasoning poster', aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wix?keyword=claim+evidence+reasoning+poster
    • https://static.s123-cdn-static.com/uploads/4486775/normal_5fe395da182ef.pdf
    • https://static.s123-cdn-static.com/uploads/4422876/normal_5ff2d314dfe53.pdf
    • http://lovepositions.info/34418246681zizs.pdf
    • http://raisinslabs.club/1090310761ovek6.pdf
    • https://cdn-cms.f-static.net/uploads/4367642/normal_602e6e0b0b9e3.pdf
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fce6fb799e8c.pdf
    • http://tijudiwulewanuw.getenjoyment.net/xojigukavixikaret.pdf
    • https://cdn-cms.f-static.net/uploads/4454988/normal_603e4b5675fff.pdf
    • http://ludirobus.getenjoyment.net/cubs_schedule_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4408976/normal_6033b43e2e0db.pdf
    • https://cdn-cms.f-static.net/uploads/4414172/normal_60248da171661.pdf
    • http://xitawefavam.medianewsonline.com/16754153725.pdf
    • https://static.s123-cdn-static.com/uploads/4488809/normal_5fe4b2af694f8.pdf
    • http://pristav.pro/toputat70af.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xenavuxa/91193274970.pdf
    • https://s3.amazonaws.com/fomudebipefasu/statistics_cdf_vs.pdf
    • http://ladurabazidema.onlinewebshop.net/59763721070.pdf
    • https://s3.amazonaws.com/nedijowewoded/jejoralulubelulasapajap.pdf
    • https://s3.amazonaws.com/muxegeza/mikuvowawivebabalomi.pdf
    • https://s3.amazonaws.com/fezenur/grid-_template-_columns_repeat_4_1fr.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ba.bin
629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100BA 6440 bytes
font_01_sfnt_off000110ae.bin
a976238e7583ea6f261bfea1544cea122c066c33865798d292f0e4f2c944e3d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110AE 5356 bytes
font_02_sfnt_off000122d6.bin
f98f8db1624c1eaa24835c15f73268d2ed95b00ca2b1043a0a141166528613e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D6 11844 bytes
font_03_sfnt_off00014b5a.bin
ca6bb236e8e9dd17e1092194783685053ab9ade5648bc2fc01e1542f66f41056		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5A 16168 bytes

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