Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ecff1c162a2c4f…

MALICIOUS

PDF

66.2 KB Created: 2020-11-10 09:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f7baac3a34db33930a11da7e8291f1de SHA-1: d3803429239123aedbd0872fa0258561804269f4 SHA-256: 24ecff1c162a2c4f69e634311db81c5a66ffa717df6e47005c3e15f98841cfb0
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafficel.ru/123?keyword=royal+oaks+elementary+school+calendar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421787/normal_5f9c80415ea34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5fa35d0bc0839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f8994628f9d0.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/e84e6819-fb61-497b-a0b3-c62537129fb0/world_of_tanks_tank_guides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a59a6de-e45f-44ca-8aef-7b245c804633/rizofupotimopelozugamonox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4735a196-4dea-4dc0-9b37-7fde7f1cb194/lupaxego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b02331-9c30-4632-84a5-17c5c8cda634/glucocil_scam_or_real.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476e0a26-2b1c-432d-9aaf-cc6040acb2b3/2013_turbotax_home_and_business_down.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a955fbb-03e3-4307-84e6-a2ae62c5e55f/noneg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded7f4ce-2bf7-4c98-9f39-4db41b6bc7b3/western_union_money_transfer_form_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB244 5352 bytes
SHA-256: 36f73ae60390ba35ae51d4346dc6ac5243f8473984ec4457eb0b652d192d218a
font_01_sfnt_off0000c456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC456 10424 bytes
SHA-256: ad74ad40b02cc7aac95d0044d780fefa918e63c5270043a2256d27e72eeaa577
font_02_sfnt_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 16076 bytes
SHA-256: d5797f08becf5301e59b03c9e561a561b786babfe4b2d135aa267657689c68fb

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