Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67b577f9eeb183b…

MALICIOUS

PDF

66.1 KB Created: 2020-12-20 16:43:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e31d85260341fe433ece957ad49d3f09 SHA-1: 9c9358dd7060a7b39ff1608d8e12eecdcd7f66f4 SHA-256: e67b577f9eeb183b580c2d79f55e5dcf9f5d0e30854258a9317f495549fce7e0
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 0.9998

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://traffking.ru/123?utm_term=white+cloud+flea+market+2018 PDF link annotation
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/womedewiwafogos_lorozarabij.pdfIn PDF document text
    • https://kulirudezu.weebly.com/uploads/1/3/4/5/134583820/1379234.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/gavaxevimikomewuduja.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/6cb214de-59f8-47b9-86e5-bb4020503796/4983033771.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/cuales_son_los_derechos_humanos_laborales.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/paul_rosier_sentencing.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/earth_science_regents_august_2017_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f8f0f7-f948-41e3-855e-93cea19951b5/bsod_unmountable_boot_volume_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1270b07b-780f-4d73-bd63-6160933236df/mufezusozemukusajubamep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46283286-21bd-409d-955d-314b8db577b5/best_hieroglyphic_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba6ff6f-25e8-43f0-b3fa-a735fc1a8875/7058753317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc4f74c1-bbd8-440e-b76c-8a87516b92b6/lomomeguranif.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_off0000c67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67F 5680 bytes
SHA-256: c6936558ea47a888416d927a9eb5a5653a8044612727bd262c56089d30cfbe0e
font_01_sfnt_off0000d9c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C2 10024 bytes
SHA-256: 49a963b281b9c07679afa8d0c2a0f0f3d419c87e1e2c2cb23e34a2ce9f05d14d

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