Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adc8886bca47a32…

MALICIOUS

PDF

73.3 KB Created: 2020-12-23 04:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6cdebea9fc283a086b33dbc0acb5c3aa SHA-1: 9be7ff687f4801ac98cdf98bc533a3c58cc548b0 SHA-256: 2adc8886bca47a32d4e1d7d37328df235fbcd96782f4d39317bc0266b13c16ba
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/strik?utm_term=ice+cream+shops+near+delray+beach PDF link annotation
    • https://katatowuli.weebly.com/uploads/1/3/4/8/134879603/vopuluzo_kelakamux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rerinago/rupinder_gandhi_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f54e63cb-0809-4412-ba4f-d5d36edcada7/96962077886.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/67171726564.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/zixineluxubufixulelanapo.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/digital_abbe_refractometer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ea871d-3291-4549-a846-624bab006827/96864919325.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/shimano_deore_xt_bremse_einstellen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dc4aa55-7abd-48b4-af26-9e6455acd533/61716813630.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/sevefevepenamagamojufufag.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/power_rangers_ringtone_mp3.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DF 5492 bytes
SHA-256: f5251ce894bfebf9bfa48a66b3070907046cf5bb7dec1c5fa1989519319c86e9
font_01_sfnt_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000f2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BC 11032 bytes
SHA-256: d0821d7052cda64bab0b736862dbff6607a9d86b2b33f97999427323ba2844c3

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