Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c607314a7ba9fc…

MALICIOUS

PDF

82.4 KB Created: 2021-02-24 23:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d5ed8e65a7486e1c28e8e0eb8c178a9d SHA-1: 020ba829be69feec10d04183b29f3e5126b38fe8 SHA-256: d5c607314a7ba9fc19342cd00d6b447230aab931a34ad67a49a20a07d6799dc4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack aiming to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://druttle.ru/award?keyword=free+project+management+software+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450336/normal_5fc9cd1687183.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/72449199619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5fcfee9aaf3df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_60255a783eac3.pdfIn PDF document text
    • http://xexogafuko.22web.org/93803124434.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/94538759132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482406/normal_60242b92a4794.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://dodigemadepa.epizy.com/funirusenuxoxixikejepozo.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/68959002725.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/dubinurakeroj.pdfIn PDF document text
    • http://muzubakow.epizy.com/kewumopavolipufe.pdfIn PDF document text
    • http://xilawon.epizy.com/complaint_handling_at_universities_best_practice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/spinal_cord_arteriovenous_malformation_mri.pdfIn PDF document text
    • http://tanozetodane.rf.gd/tiporedakotupa.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/sekilaz.pdfIn PDF document text
    • http://tekoboworitutew.epizy.com/rogixojebin.pdfIn PDF document text
    • http://borobosen.rf.gd/15130885319.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/94415696237.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/xelozobibidokifegubuzav.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/generation_of_computer_programming_languages.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF662 5484 bytes
SHA-256: 6e144fa4cb2cc89b0eb0d65063fbb01acacc368b7f5379e266a5610f6ab5df69
font_01_sfnt_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 6096 bytes
SHA-256: 5c8315477683aa1d3fd841116862019cbbba5c4771cd38d8881bbb85ed012e8f
font_02_sfnt_off000118be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BE 10292 bytes
SHA-256: b96095a855347febf30ca0372e6cbf7d7cb3ca47ecf13b6850ef1145e0f14fa9

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