Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccaacfb11349f43…

MALICIOUS

PDF

67.7 KB Created: 2021-02-19 16:55:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b86116783129b2eccd1532c92e518bcf SHA-1: e9bc41e16c66c1bcd947c634c4d46f1870bb57f0 SHA-256: eccaacfb11349f43b73cc8564d03f5d6e72be46d7e25e9c3e3fe2e6731b4d502
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to suspicious domains and are indicative of a link farm or phishing campaign. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting the primary goal is to direct users to potentially harmful external sites. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier output strongly suggest malicious intent.

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
  • 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/123?utm_term=how+do+i+pair+my+bose+wave+soundtouch+bluetooth In PDF document text
    • http://raisinshq.pro/80502432343mmwnj.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/1d8865.pdfIn PDF document text
    • https://lujotasapamuxa.weebly.com/uploads/1/3/0/9/130969194/benirawemarukumuno.pdfIn PDF document text
    • https://zobimodajozo.weebly.com/uploads/1/3/4/3/134340865/nanazevoneke.pdfIn PDF document text
    • https://tatasabazenaxaj.weebly.com/uploads/1/3/2/6/132695883/pidorewez-lalux-fidufib-jesezotetu.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/d2a2219.pdfIn PDF document text
    • http://lg-supportteam.com/cambridge_exams_extra_pet_with_answersw41id.pdfIn PDF document text
    • https://sowurudiz.weebly.com/uploads/1/3/1/4/131438308/4450b4d70ddd3.pdfIn PDF document text
    • http://stingeksoj.online/chronotherm_iv_plus_manualrqma9.pdfIn PDF document text
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/ffbc40c.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/nuselufuzo/bahubali_2_songs_tamil_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/wubesakegezixozal.pdfIn PDF document text
    • http://nozefemalevarug.rf.gd/kufufodefukilutal.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/luka_lecet_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/living_things_worksheet_grade_3.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_off0000cd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4C 5668 bytes
SHA-256: 71bd74ef8b85c2b384f0bb5eaf1a83825d0c2009ee841fca467abd2e3696fcae
font_01_sfnt_off0000e07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 9616 bytes
SHA-256: 6679e21c1aefc5d8e9df7b6c5d7e83999f2a411e3b2abc7878e022d63d8e7d77

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