Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4cfc5729f13212a…

MALICIOUS

PDF

63.7 KB Created: 2021-02-19 21:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 92c6f2684f10cd3eea42db036577d1ae SHA-1: 75d933f1dc8247bb0c9f2769c0174ea719eb7388 SHA-256: c4cfc5729f13212ae89a0715c5a8a139b652fcfa29c4052c4107545450b3c1bf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text suggesting it is a lure for search terms like 'El novio robado chapter 12 answers'. Numerous external links were found, indicating a link farm or redirection to malicious sites. The presence of external URIs and the ML classifier output strongly suggest a phishing or malware distribution attempt.

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 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://maypoin.ru/wix?keyword=el+novio+robado+chapter+12+answers PDF link annotation
    • http://vashmaster.info/emergency_preparedness_merit_badge_worksheetb1n51.pdfIn PDF document text
    • https://pigixona.weebly.com/uploads/1/3/5/9/135986477/fizotoz_furika_rulurog.pdfIn PDF document text
    • http://kvrovk.xyz/79110674007ju1rr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448549/normal_5fdde9c774544.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481271/normal_5fe234b3898fc.pdfIn PDF document text
    • https://gexipatar.weebly.com/uploads/1/3/1/6/131606255/sovumesuwem.pdfIn PDF document text
    • https://cdn.sqhk.co/pizokifuxe/jiijd3I/86910382388.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/xkMXPhe/zuvoxogu.pdfIn PDF document text
    • http://roskycnmx.com/tijofuziditebuxutogi0tyx2.pdfIn PDF document text
    • https://zolaverapudo.weebly.com/uploads/1/3/0/8/130874102/tonepad_viloledituzobek_pirukibaxem_vebiwebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5ff994f985cbb.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/difevmp/78691938536.pdfIn PDF document text
    • http://car-den.ru/12591633161mzrgj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485313/normal_5ff7e8312c65a.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/CjgZge0/sejeduvu.pdfIn PDF document text
    • https://vipigenomunopem.weebly.com/uploads/1/3/1/3/131398348/kopav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD2 5592 bytes
SHA-256: 60a3a3214c78de1b5cfaa7d88c9f3bf1eddeb24d5e610995281aae081c081bc4
font_01_sfnt_off0000d0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E2 9716 bytes
SHA-256: 455b641ba8497d073a1bc125fdc947d803d51f5ca4f2138fc5f4b0a4645f69f0

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