Malicious PDF — malware analysis report

Static analysis result for SHA-256 abaefc46147d5b37…

MALICIOUS

PDF

87.2 KB Created: 2021-03-17 16:19:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: aff2ba011030999e8da3906e8e8d36c1 SHA-1: f12c61b7cde1914832d37699f246aa4450677cc0 SHA-256: abaefc46147d5b37904a3a0eee4db9c5210c4f0aed9566cc010132bc58a12291
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'free worksheets', aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=beginning+band+worksheets+free PDF link annotation
    • http://xoxosedefoxadu.mygamesonline.org/37539229617.pdfIn PDF document text
    • http://frukt.fun/xupudedugenonufuxarobozzfbj.pdfIn PDF document text
    • http://replyua.site/dell_poweredge_r710_bios_settings_for_hyper-vztqx9.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/jj1Tyie/gemitasejule.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/dEZtOjc/mazajenakemitatobebajipab.pdfIn PDF document text
    • http://helpcopyright-service.com/5073300396ywjx6.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/84603081518.pdfIn PDF document text
    • http://pomirkapa.site/brideshead_revisited_sebastian_sheet_musicobeko.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/vitox.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/hcGhghc/9274123581.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigexosav.myartsonline.com/kusujavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b078d2-9b93-46be-9a35-147354b6006a/40805682326.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/color_fireworks_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/fufoguripazepuxip.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/14282507248.pdfIn PDF document text
    • http://lajovaputap.myartsonline.com/novel_ceros_dan_batozar_tere_liye.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/rheem_tankless_water_heater_troubleshooting_guide.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/sipuburumep.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/gijugafaxuziso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e626c823-a121-4947-919d-2bb54b68c385/vemuderevevisedilup.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/zazuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e99c414-b808-458f-9a43-a0347dd200d6/homelite_330_chainsaw_carburetor_adjustment.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001164d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164D 5484 bytes
SHA-256: 67f0061306ccad0ebf54c4454a07bfdbb09039b353dbe318723e4a58431ccb27
font_01_sfnt_off00012907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12907 10828 bytes
SHA-256: f6045a97776b21c5c590f303c4746bab89d7d21239accfd9e0f0b68ac90fd59e

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