Malicious PDF — malware analysis report

Static analysis result for SHA-256 6217c04dedd2ab08…

MALICIOUS

PDF

88.0 KB Created: 2020-12-22 23:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f6ebc2538343fce155d437f0b882a8ac SHA-1: 921acc8dc290dadb8073e0f418d0f97eddb3212f SHA-256: 6217c04dedd2ab0828fd438e67b228bdf5c7470b1ac18e5cc56359887acca604
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://trafffe.ru/123?utm_term=hockey+legends+unblocked+games+66 PDF link annotation
    • https://fenatelelopowi.weebly.com/uploads/1/3/4/5/134510159/fd45110.pdfIn PDF document text
    • https://xovatofenutadom.weebly.com/uploads/1/3/4/5/134511467/zavako.pdfIn PDF document text
    • https://bafokaxaxex.weebly.com/uploads/1/3/4/8/134881351/xezepuvu-romelub-radimola-zomibajeropotix.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://uploads.strikinglycdn.com/files/444d10cb-8ec3-4294-b401-0ff841e52295/7719242778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65310fb-d497-494a-9df9-911b542f6882/how_to_make_kraft_mac_and_cheese_in_instant_pot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9e3bda9c57a97be47bf/t/5fc28ea8f3de5e49b5b7a3c2/1606586024897/book_jacket_design_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b5b967-2dcb-42d1-8d98-31683f6a1a86/4_classes_of_biological_macromolecules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2de15a-c52d-4130-a399-29c8a2f5fed7/head_first_java_10th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c3cea2-fa64-4312-845b-8d3d71e39e1a/42571799290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb52a55c-0114-4a80-bc4f-17182e2cf4fb/25055901328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d106c1-1fd6-4f34-a021-e9c5377b181d/see_you_in_the_cosmos_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643a28f2-ca99-45c6-878e-3427a149fb37/78128331481.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0012c12facd59cea80d2a/t/5fc40c573570fb44d1814dfe/1606683735730/wutolurova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98319513-bdc5-41d3-a15c-a5bdd37c028c/gizosuzasotezeganozapuzal.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_off00010da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA0 5340 bytes
SHA-256: d3f5a4346bdb65ed7172e9f8f8a6582936ffa571b2a027be51d5b715e5c873a9
font_01_sfnt_off00011fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAD 11232 bytes
SHA-256: 384c065e3fde31e630244e461f1d5b813dfdac98ff1b3e189f1e7baa82f4284c
font_02_sfnt_off000144de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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