Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe2114f702b43c8…

MALICIOUS

PDF

69.8 KB Created: 2020-12-22 18:32:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9b8914a45c6e33f9a61366a25241857f SHA-1: b76b1cbb73cbc269843e1efa0645b9d6bd023f77 SHA-256: bfe2114f702b43c80c9bac9bb3814a23dc4bd0a99bcf4eb44c83b2743fec7f0c
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'Brooks ghost 11 running shoes reviews', suggesting a lure to disguise the malicious intent. The presence of multiple external links and the redirection heuristic strongly suggest this document is designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=brooks+ghost+11+running+shoes+reviews In PDF document text
    • https://pusixeraz.weebly.com/uploads/1/3/2/6/132681440/vuragibul-lokajusovawagod-koxarodaza.pdfIn PDF document text
    • https://xutesinazered.weebly.com/uploads/1/3/4/5/134529246/kegaxanukalop.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/344109dfcecc78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454424/normal_5fdad85eeec5a.pdfIn PDF document text
    • https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/pivebilojivaka.pdfIn PDF document text
    • https://zezogilak.weebly.com/uploads/1/3/0/8/130874046/5014743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5fa0b8484cbac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fde95ce5b7bc966055f9f1c/t/5fdebbdaf11f517dbbccb16a/1608432602579/free_live_tv_apk_with_epg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1d314f07da69d6435733/1606229298415/33503375890.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/niles_north_athletics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b423f2c4-3d6f-4ef1-a47d-de3ce61af405/empirical_formula_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e47e3e-0dc7-476a-a809-2bca75675231/31144103899.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_off0000d44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44D 5024 bytes
SHA-256: 3f27c003ddbf6d012d936bd0126d75ac0bdc1a1242392747bddc1a69438872f7
font_01_sfnt_off0000e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE580 10776 bytes
SHA-256: 677e7e6af74ec66fd3965c30f1bf284a19216cdf35a09d6c39d3d06f503710d1

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