Malicious PDF — malware analysis report

Static analysis result for SHA-256 56a60a0dfeafb63e…

MALICIOUS

PDF

81.2 KB Created: 2021-03-22 16:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 5b4213c8b20b601ab0d82a8a86d8a05a SHA-1: 0580666eed577771c2f1601a70464660b5d80c03 SHA-256: 56a60a0dfeafb63e2ac2c2a9416a0aa51271507a8f29029a5e29a068609afdec
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or redirection attempt. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'how to speak spanish fluently pdf', likely to entice users to click on the malicious links.

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
  • 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://yafferge.ru/award?keyword=how+to+speak+spanish+fluently+pdf In PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/wimutu.pdfIn PDF document text
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/zivalosugudarax.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/pirawegi.pdfIn PDF document text
    • http://ziwavabewite.66ghz.com/ikea_katalog_2020_download.pdfIn PDF document text
    • http://togimiguluvux.iblogger.org/gamuzezek.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/ganubatebedoxez/83271356790.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/96256198147.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/bokepinetosijupi.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/fogofinelifanami.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/bancolombia_personas_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4823ee4c-3fff-4fc5-8e0b-1b43f38f2eb9/tn_v__binh_php_tn_t_tp_13.pdfIn PDF document text
    • http://bitugoxopezuwu.rf.gd/posopatumogoreza.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/6489588124.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/filuxumutixoja.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/30803556122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68614520-f5ca-4e88-b88c-f3060c3c10fb/the_dating_game_killer_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1156a2ab-cc61-47d2-ac56-af01f10cd544/youth_ministry_curriculum.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/6534998500.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/1716498940.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/maripowal.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_off0000fee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE6 5252 bytes
SHA-256: 6760d07a16d9fd428de328019086d4422c15d9f22aaf39a6adeddd6031018006
font_01_sfnt_off000110de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DE 10884 bytes
SHA-256: ef28f760b19cd09c434c0717a81c2395e620fc61585277b13400d6a1fb93446e

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