Malicious PDF — malware analysis report

Static analysis result for SHA-256 720851b4de062435…

MALICIOUS

PDF

67.8 KB Created: 2021-02-21 16:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e96c76ae8430265a17ff55875580523d SHA-1: 34ab5e39a62c45f994ce7eb982f2435bb9d1c27b SHA-256: 720851b4de062435ded34d2855c58612aafa03c8c8131e651e1012f8066054de
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic identified a large number of external links, suggesting a link farm or phishing campaign. The embedded URLs point to various domains, many hosted on free services like Weebly, which are commonly used for distributing 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://crophysi.ru/123?utm_term=prc+148+tm PDF link annotation
    • https://gegiwozik.weebly.com/uploads/1/3/4/7/134719936/7f803a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_6000cb707f9e9.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/7719109.pdfIn PDF document text
    • https://wiselorasen.weebly.com/uploads/1/3/0/7/130739143/zisaripipejuxezizi.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/hhdnb6e/jowepufugilidinelu.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/mividililotiwowewuz.pdfIn PDF document text
    • https://tesiligozi.weebly.com/uploads/1/3/1/4/131407846/ecde7ee2bf69.pdfIn PDF document text
    • https://polerobozugewif.weebly.com/uploads/1/3/4/3/134344868/754d59baa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444115/normal_5ff8b6a1ab739.pdfIn PDF document text
    • https://fokutape.weebly.com/uploads/1/3/2/8/132814024/9449603.pdfIn PDF document text
    • https://devonejejarib.weebly.com/uploads/1/3/4/6/134608322/mideruzuda_buboxuso_mikafonib.pdfIn PDF document text
    • https://vesumuzuvof.weebly.com/uploads/1/3/4/6/134685641/tibelokodimixow-patinoxore-xagol.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/gedesisumi/non_binding_offer_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/cuneiform_alphabet_to_english.pdfIn PDF document text
    • http://pidulejos.epizy.com/74177833672.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/veketimisujokelivave.pdfIn PDF document text
    • http://puxejinasor.epizy.com/63310762788.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/slumdog_millionaire_game_show_questions_and_answers.pdfIn PDF document text
    • http://kamegowemegoguw.rf.gd/lebatamofejodisi.pdfIn PDF document text
    • http://gimokoso.epizy.com/67435672138.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_off0000cb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB41 4860 bytes
SHA-256: c7792c10adbca62ab4b65b6bd0c52e9b461a322e5d77a473d49e42731330ab04
font_01_sfnt_off0000dbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 11088 bytes
SHA-256: f4f1b97b130c3c3dae9459633b904f1589bdb9c019349ca18505f27cd507f081

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