Malicious PDF — malware analysis report

Static analysis result for SHA-256 62121d188d6ef7c6…

MALICIOUS

PDF

76.3 KB Created: 2021-02-21 19:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 23cc202c22f14881baa604955f5fe52d SHA-1: 1f10b953f5cf9dca786925310578ed368dbee9da SHA-256: 62121d188d6ef7c61d6e9722f5cd03bd063388960c075de867dce3d362fa2981
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. One prominent URL, 'https://maypoin.ru/strik?utm_term=pet+safe+dog+training+collar+battery+replacement', is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. The PDF structure and embedded links suggest an attempt to redirect users to malicious content.

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
  • 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/strik?utm_term=pet+safe+dog+training+collar+battery+replacement PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405662/normal_5fdf5b8237aac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487191/normal_5fdfa31d73675.pdfIn PDF document text
    • https://fogasofimoxor.weebly.com/uploads/1/3/1/0/131071298/3958640.pdfIn PDF document text
    • https://tejenopaje.weebly.com/uploads/1/3/1/1/131164027/5848813.pdfIn PDF document text
    • https://kumajevebak.weebly.com/uploads/1/3/1/8/131856027/3506830.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416665/normal_5feb2d81cd29a.pdfIn PDF document text
    • https://bizitodavil.weebly.com/uploads/1/3/4/3/134321392/4344e24e13bea1.pdfIn PDF document text
    • https://pozusope.weebly.com/uploads/1/3/1/4/131453674/bipaf.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/zetituri/bengali_dictionary_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/a_aa_movie_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/79013682131.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/vamikixiruzobusupe.pdfIn PDF document text
    • http://besevinoferoza.epizy.com/46211970840.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/95107049297.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 5720 bytes
SHA-256: 0f14df629f3c7a9ab65572d708c8fe4de956af519d1c8054ef837e18519183f2
font_01_sfnt_off0000fded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDED 11136 bytes
SHA-256: faf8a245ff3b098836c9bb4bbe2c267f9f0cb0ab351ba13e65aa58a5504e094d

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