Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db6497b18b6e6cb…

MALICIOUS

PDF

70.3 KB Created: 2020-11-27 16:39:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d14228ccc2995aa6c78b970aa4742c1b SHA-1: 1ffd98138ffd53908a850e3b254ed04f13d65021 SHA-256: 9db6497b18b6e6cbf23c6efc2ddd8a80cf86c5e0e6c78c520bd2452edf3d02d1
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://traffine.ru/123?utm_term=graco+click+connect+35+car+seat+base+installation PDF link annotation
    • https://bobepeduzogir.weebly.com/uploads/1/3/4/6/134673546/3457845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/debamijizozexo/rational_fasting_by_arnold_ehret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79a9294-c2d1-4e19-abb9-b0be152551ad/fortress_phantom_gravity_metal_detector_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/tree_shapes_identification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dee18b06-80f4-4f11-bf38-fc2eb3d5a1d8/nemevemitetolobabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/788c03e3-1de9-4f6a-88fe-34467e31eb0c/40507549287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a79a4dc-4906-42a9-9b68-054de115421c/soccer_head_championship_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51aefdf8-ef5f-428a-a200-c8822dcaa6c4/dozufuwufinomedizovazive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762f3cff-6d21-4f97-bb4c-5ee48a41bbd3/88975258291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8eac9fd-a3a6-4488-b4ab-b1c223f4af13/historia_de_abezethibou.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/putonadidanodavezobawen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fa584e-7a1c-490c-8f4c-a7a763eb8cfb/vepurukomikadotipige.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/chang_chemistry_13th_edition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 5104 bytes
SHA-256: f7070229ca23f18edeb8e27d67762cc8d633840b5e49bb2e4ce3b86dfd095960
font_01_sfnt_off0000daf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF0 10300 bytes
SHA-256: 6edeba811114ef2439ab542e3179d3297f85a29059ef108d60d74c4ed89f6513
font_02_sfnt_off0000fe07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE07 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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