Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb8facfa5dd4cf1…

MALICIOUS

PDF

94.2 KB Created: 2021-03-11 03:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e055f9757529fbd710a0427aebd8dad7 SHA-1: 83ee6c43289155bb9d7a6ec69d4ceb06fa3f93da SHA-256: 3fb8facfa5dd4cf1a136905be688f139c44fe072f209c95d85718da868795287
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'baarspo.ru', which is likely a phishing or malware distribution site. The document body, though partially corrupted, contains text related to a periodic table PDF, suggesting a lure to disguise the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://baarspo.ru/strik?utm_term=tabla+periodica+de+los+elementos+pdf+para+imprimir PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423148/normal_5ff37ea72b204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_6036ad0674ad0.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/xudavaxujalukom.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/49458414029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449184/normal_604609fcda580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_6023f3c4c878b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415936/normal_6030909c60af6.pdfIn PDF document text
    • http://xonigej.mypressonline.com/why_are_my_outdoor_lights_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530578/normal_6024a615240f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f977acaf-4f93-4bc3-9afe-1012bdb4427b/48202592036.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/novumaxaberitotoxaterux.pdfIn PDF document text
    • http://fozajabuwipebo.epizy.com/toyota_camry_hybrid_battery_price_malaysia.pdfIn PDF document text
    • http://zevusup.atwebpages.com/ditog.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/dividing_fractions_by_whole_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/cyberpunk_2077_beta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe567e0-5aaa-49e2-8563-50c4d74dca6c/twilight_full_movie_download_in_hindi_all_part_filmywap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9279296-a8ab-4fde-ba4f-48e82abe4777/40130639330.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/vexenabesigigar.pdfIn PDF document text
    • http://naxepatixotilu.rf.gd/regosisoxikudugitol.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/29413477757.pdfIn PDF document text
    • http://gatinilub.epizy.com/40565707387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319d0356-7f65-4d2e-baf5-8dbbce92d551/wenemituzefanu.pdfIn PDF document text
    • http://novosumagib.epizy.com/8321212815.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10146 5392 bytes
SHA-256: 94ff933e046022a615f0543792e80112c39bff8897b23b301972232cd0e49937
font_01_sfnt_off0001137a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137A 14336 bytes
SHA-256: 7703368bf118011ac06117025ca3f67fcaac51680798124d9ebefc9c3644b51c
font_02_sfnt_off0001418f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418F 16840 bytes
SHA-256: 830be63044a90c9bb04362125fb192f534dbd1cfbc7624d1f0b4f30b82c9081d
font_03_sfnt_off0001594d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1594D 6096 bytes
SHA-256: 49fe1638bbd12276e9125f64251bb40536f47d85e790d1c1637d07234f09d189

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