Malicious PDF — malware analysis report

Static analysis result for SHA-256 52d77e703708d961…

MALICIOUS

PDF

71.0 KB Created: 2020-11-25 03:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4b90f3c6bd87de06e8a341d3febc4612 SHA-1: 207acfc8ff0f176e2abed02ae375a100fcbc8fd0 SHA-256: 52d77e703708d961dd95f3b2d592fd0c3ffef182350b9c6326c9212759020ad1
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of embedded URLs and the heuristic firings suggest an attempt to direct users to malicious infrastructure.

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
  • 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://gettraff.ru/strik?utm_term=how+to+increase+diesel+mpg In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5fb41b85cd2ed.pdfIn PDF document text
    • https://wivujugojuz.weebly.com/uploads/1/3/4/8/134883460/7a094a5cf1790b3.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/f271163d37fbca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f8de27b249eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_5fa0b73d32f88.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/5131152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_5f9d5d4d1fba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373239/normal_5fac2cb82beb8.pdfIn PDF document text
    • https://xubupibef.weebly.com/uploads/1/3/4/7/134742940/38d7397.pdfIn PDF document text
    • https://vibupawovilopi.weebly.com/uploads/1/3/4/3/134377541/2000866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fa7f5486e54f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387922/normal_5fa95b564ee2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458615/normal_5fb01fae67d30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f890e5016ba9.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/lanubili/jahangir_preferring_a_sufi_shaikh_to_kings_demonstrates_the.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/google_analytics_tutorial_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/phpstorm_auto_format_indentation.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/ruxono.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB22 5236 bytes
SHA-256: 0dea1526b720090af99b2612924bbaa3b4ae4e0a80141969a35986d1122beb9c
font_01_sfnt_off0000dcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDB 10564 bytes
SHA-256: 83d2a39a360d1c77931e229d29e503e57948283d7b8a7e2404d2f34300da7a3b
font_02_sfnt_off000100e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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