Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a92600b030f287…

MALICIOUS

PDF

75.1 KB Created: 2021-01-25 19:58:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4f04a6c3adcc2605c29c82470639a13b SHA-1: 1c0c66dfadd9f90848840ab1d6f58d8d53de0529 SHA-256: 50a92600b030f2877b671774321402355c811f268df1b2c5ffe971bc72667a7c
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a PDF link farm. The ML classifier also strongly indicated maliciousness. The document likely serves as a lure to direct users to a network of malicious websites, potentially for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to leverage web infrastructure for malicious purposes.

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
  • 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/wb?keyword=conspiracy%20synonyms%20formal In PDF document text
    • https://wesulabiduzipu.weebly.com/uploads/1/3/4/2/134235649/degizikafopora.pdfIn PDF document text
    • https://cdn.sqhk.co/givikufat/ggHtMeu/arcademics_skill_builders_login.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480755/normal_5fe4ea3ca3029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501208/normal_60099c656b125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_600d269cb0a8d.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/boliwivis-rulupixasovax-girupoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421049/normal_5fe068ee513fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471252/normal_5fd0bb9481d2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424662/normal_5fe4c33fc4713.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/fd051dbd70c.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
    • http://gabamad.epizy.com/15710906912.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_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 4876 bytes
SHA-256: 1dc77a6e66f780bdc3fa85f9533fa3b0c1a110aa288271df46b09cd7a728ebf3
font_01_sfnt_off0000ecb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 10796 bytes
SHA-256: 9033573c1043fd7b4bf682b69c3e2cfaa8d5534a5e8f57438958878645b485fe
font_02_sfnt_off00011119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11119 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.