Malicious PDF — malware analysis report

Static analysis result for SHA-256 174d58fd5f23e130…

MALICIOUS

PDF

67.1 KB Created: 2020-11-18 02:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 66626eba4e2e02a8be46b2fbee184e4a SHA-1: eb4d1701e483e5ff7830360f1c70aaca488c3494 SHA-256: 174d58fd5f23e130a584575ace3529659d4512756b50ff147fd3bc63dd019f5a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'Daoc paladin guide', suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=daoc+paladin+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418993/normal_5f96f508e4bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5f8a285a1d844.pdfIn PDF document text
    • https://wufenimikefi.weebly.com/uploads/1/3/4/3/134366244/4261.pdfIn PDF document text
    • https://gerorajowivorem.weebly.com/uploads/1/3/4/6/134686153/vuxamat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f98ce5b7390b.pdfIn PDF document text
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/wofuzelos_fuvevalalorobol_gagituv_sukubabojuxaris.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_5f9b3bb52dec3.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/e0afeb07-12b5-413c-9290-098d4641eb3c/gemuwif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73dee401-e13c-4ecc-82dc-a00bda4eaf13/konadifojamezewevidame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ef6e71-1839-445f-9345-e9f3fadd8a1e/joviwekududamirafanipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723d59c7-71d2-4081-82e3-b9c97540931d/2017510569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bcca7f-3851-4271-b1ce-cb337f4ec824/zakulabinek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6247b099-44f0-4dde-82a2-e225484ab7db/penofin_red_label_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e0e08c-72d9-44f0-bdd3-d48732cbaa82/dewimeruvakevitinab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf93b8d-8fb2-444a-a65d-a461eb222f1f/beer_before_liquor_never_been_sicker_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5929b76-0259-43d4-b805-9b5814e7095d/fugusaxodafitofelufemedik.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_off0000cae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE1 4968 bytes
SHA-256: 375e919f23f765596c0ea7b70ce5e8709c198dcba68b341ee5662fa7cf30969d
font_01_sfnt_off0000dbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE1 10628 bytes
SHA-256: 2a148a7c5136b8a21a8c06c813fddbaeb50e48ec0c25acf7509d65fcba6544ec

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