Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0f21b2dde43ca0…

MALICIOUS

PDF

70.5 KB Created: 2020-12-17 08:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9327783bebf1a0ad3699d1aebcb19138 SHA-1: e0154c869465e2cab4eac03ac47d42e96808589a SHA-256: db0f21b2dde43ca01db4dd68845d94979a4881a693f3bd5fb0e164e52f0a73a8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The embedded URLs and the document's structure suggest it's designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript for malicious actions, and the presence of numerous external links points towards a phishing or malware distribution scheme.

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://traffine.ru/123?utm_term=b2b+email+lists PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384642/normal_5fb793b3a5210.pdfIn PDF document text
    • https://xozoravupot.weebly.com/uploads/1/3/4/3/134314106/6483340.pdfIn PDF document text
    • https://vafuzetok.weebly.com/uploads/1/3/2/7/132740798/3957983.pdfIn PDF document text
    • https://besavijoxamidu.weebly.com/uploads/1/3/4/0/134096513/ziwigadaw.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/5812975.pdfIn PDF document text
    • https://desemezek.weebly.com/uploads/1/3/4/4/134458593/xejatog_duvezigeru_migazu.pdfIn PDF document text
    • https://dojufewuwi.weebly.com/uploads/1/3/4/2/134235401/3035337.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/jolituzoji/shark_pet_perfect_filter.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cb348ef7301f8b29e6b1/t/5fd0008186dbd518ecc78777/1607467137161/the_farmhouse_at_veritas.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/touhou_genius_of_sappheiros_weekend_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/89345308685.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/online_atm_card_form_sbi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a090405d5340f349e1df/t/5fce711dcbbd2e3210441cf9/1607364894032/ddpai_mini_5_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/diliwejemufobuxuwuko.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_off0000d73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73A 5056 bytes
SHA-256: b64fc854f5f63ee5de3467ebd472303dc35b87ec4f6ea045b23f822c5e0cbb6b
font_01_sfnt_off0000e858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 10992 bytes
SHA-256: ec02ba32a38f55c7c235c62b086bd03b10b2491633486bc58061c2c6e04b68d4

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