Malicious PDF — malware analysis report

Static analysis result for SHA-256 3118b24e066f0fc0…

MALICIOUS

PDF

95.6 KB Created: 2021-03-04 01:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a03a816ff9ee710e11012b3a1cc5911 SHA-1: 185f5cf9e7b91271cc0825468570b9115fc6cad9 SHA-256: 3118b24e066f0fc04783ef8d41c73e4e3259416e68390c8066b90511c311ad19
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous links to external websites, including one that appears to be a lure for 'ap literary terms multiple choice test'. The presence of embedded URLs and the overall structure suggest it's designed to redirect users to potentially harmful content, likely for credential harvesting or malware distribution.

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
  • 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.
  • 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://botokaw.ru/wb?keyword=ap%20literary%20terms%20multiple%20choice%20test PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4460466/normal_5ff4130c023fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443802/normal_5fe71897dba61.pdfIn PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/c027a.pdfIn PDF document text
    • https://sazalilo.weebly.com/uploads/1/3/4/5/134592982/tigomes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462075/normal_5fd296f643a00.pdfIn PDF document text
    • http://dozazexopavo.22web.org/nonuxajavefifigiludiruz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5fe25c7de19b7.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/hdgfjax/.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_60160181c19a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5ff0d063b73c2.pdfIn PDF document text
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/96ec8decbae6033.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/mavezakakuvojak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_601231f67f79f.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/kalosusuzajul.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/vibuvomomuv/27586100303.pdfIn PDF document text
    • http://zopefaku.rf.gd/fukew.pdfIn PDF document text
    • http://muzubosumewuxem.epizy.com/binaural_beats_for_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/19892829088.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_off000134de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DE 5264 bytes
SHA-256: c90cab4aafc0b6d88bf1b863696f70806137513d7dd363a3f70cc1ff7725cf98
font_01_sfnt_off0001469f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1469F 13116 bytes
SHA-256: 620e1bcb1be080af4deb43dad440cb705425b7aff95d7ffc204d0d800213d832

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