Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6143ce7a7c4e76c…

MALICIOUS

PDF

73.5 KB Created: 2021-03-18 07:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fe5487cc5188643d13a211440b29b95f SHA-1: fb0b3c7bccc3186f8f4da7aca7c5fd99685bebc5 SHA-256: e6143ce7a7c4e76c0178a8cdb2c8c6d79a5c0c965687786ed2c03ebac13b392c
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by both a machine learning classifier and ClamAV. It contains an embedded URI pointing to 'resalured.ru', which is highly suspicious. The document body, though heavily obfuscated, contains text related to 'Jurnal analgesik opioid pdf' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly indicates a phishing or malware delivery attempt.

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://resalured.ru/123?utm_term=jurnal+analgesik+opioid+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5fd61b6fdd916.pdfIn PDF document text
    • http://nasezaf.22web.org/what_is_a_good_hook_for_an_essay_about_leadership.pdfIn PDF document text
    • http://sipoxamux.22web.org/spektrum_dxe_wireless_binding.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_60504c4cabd3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414167/normal_600320507ea6c.pdfIn PDF document text
    • http://dumokasazosates.iblogger.org/restaurant_business_plan_samples.pdfIn PDF document text
    • http://sanelobazigi.medianewsonline.com/76147443122.pdfIn PDF document text
    • http://soxitezi.iblogger.org/84744127530.pdfIn PDF document text
    • http://fefebigaxef.iblogger.org/96769685248.pdfIn PDF document text
    • http://tikenifoziv.22web.org/2016_buick_verano_service_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_6033502dcff9c.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/samsung_series_6_55_inch_smart_tv_specs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_7b7a39baa2164bd396490034099e0c41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jevelel/sawatujisigizidese.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/zodolurufozokomam.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/pefagawujupalilar.pdfIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_3f8149d7c0ed47758623d4d1f2ec761f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/jabizafep.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_ef338f97dbdd48dd804593776c90e0fb.pdf?index=trueIn PDF document text
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_05cd740a9bd14dd1a12b3a62d1375cfd.pdf?index=trueIn PDF document text
    • http://rotaduwifomol.rf.gd/xujugobuposu.pdfIn PDF document text
    • http://pamubaj.epizy.com/online_bible_study_tools_kjv.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_651fe53ffab74097a58c1c958fce3375.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 5260 bytes
SHA-256: e52b0f4ac54ff210649f1d589dab1969b70fd8bf754e123646f7997620d92775
font_01_sfnt_off0000f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF603 10228 bytes
SHA-256: 1ca4ed636020d34b3bf90a0d82d2c6c652e532d9fe0bc0449570ca43a6afde24

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