Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cc35fb1d338d84…

MALICIOUS

PDF

87.3 KB Created: 2021-03-26 08:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 553fa4732c456cb938ad79f5b276a0c6 SHA-1: 26cbb5d4fbd786f9c4ba6418c7716135a8ca5566 SHA-256: 39cc35fb1d338d84158d79b4b93135e36a18364847bdaf5bf56a6548249df366
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'druttle.ru', which is likely used to redirect the user to a phishing or malware distribution site. The PDF structure and embedded URLs suggest an attempt to exploit users through social engineering, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=glass+frog+defense+mechanism
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/891511.pdf
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5fdac55bf0f59.pdf
    • https://static.s123-cdn-static.com/uploads/4377401/normal_5ff39c984fdaa.pdf
    • https://cdn-cms.f-static.net/uploads/4419654/normal_604d0d468713b.pdf
    • https://wujadadi.weebly.com/uploads/1/3/1/0/131070572/9919473.pdf
    • https://cdn-cms.f-static.net/uploads/4388612/normal_6023d74e52732.pdf
    • https://godowipi.weebly.com/uploads/1/3/4/5/134520373/2242820.pdf
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/newesapom.pdf
    • http://tatuvidara.iblogger.org/73792012711.pdf
    • http://vuxiparami.22web.org/audacity_windows_10_free.pdf
    • https://cdn-cms.f-static.net/uploads/4471958/normal_5fd0d6613a35a.pdf
    • http://nibobokil.66ghz.com/18596445555.pdf
    • https://cdn-cms.f-static.net/uploads/4475559/normal_604d9539a371f.pdf
    • https://static.s123-cdn-static.com/uploads/4393183/normal_5fd07b75a06fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/norozovijalu/marvel_schebler_carburetor_rebuild_kits.pdf
    • https://s3.amazonaws.com/donukadizolin/6438699846.pdf
    • http://tomunipi.rf.gd/natevifumodukapadev.pdf
    • http://rajavipol.rf.gd/autocad_lt_2020_manual.pdf
    • https://s3.amazonaws.com/gekixadonuru/recumbent_bike_reviews_consumer_reports.pdf
    • http://zujogazew.epizy.com/vives_oligopoly_pricing.pdf
    • http://wonoxokibe.rf.gd/bitis.pdf
    • http://xebizeluzifavi.rf.gd/nadinesa.pdf
    • https://s3.amazonaws.com/pukaridimupo/lundin_norway_as_annual_report.pdf
    • https://s3.amazonaws.com/baritexovopa/13815505980.pdf
    • http://nipalarinab.epizy.com/spectre_performance_air_intake_system_review.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001196d.bin
1de02267b36c447ae7e5c26b3774563200af82ac704c2dec52a851d6f03be28f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1196D 5468 bytes
font_01_sfnt_off00012bd9.bin
1f0c78a6ef58ee6ca342bb0681b45437f271dc02bf6df3391050d7dd198b63c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD9 10536 bytes