Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce372c3ad70af676…

MALICIOUS

PDF

77.5 KB Created: 2021-02-27 10:12:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 28f5d406063eb84d28dc02278f92c917 SHA-1: d4a0299627ca1ccc3a29e90965df834f7a382005 SHA-256: ce372c3ad70af67651877f27cc62d885ab2a469568bd4aaa89fdc76c631ec616
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute further malicious content. The document body, though heavily obfuscated, appears to be a lure for downloading a Bible, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://xezojetit.ru/wb?keyword=descarga%20gratis%20biblia%20reina%20valera%201960%20para%20pc PDF link annotation
    • http://zawugudumi.getenjoyment.net/1302851710.pdfIn PDF document text
    • https://radunepik.weebly.com/uploads/1/3/4/6/134617153/betugulum-vuzuporubasu-vokezedu.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/giwizelajo.pdfIn PDF document text
    • http://vowazokisexe.22web.org/novodapug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_600bb9999127c.pdfIn PDF document text
    • https://dasifapuzo.weebly.com/uploads/1/3/1/4/131454731/zarowuzo-gepef-nipiralit.pdfIn PDF document text
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/lufozoruga.pdfIn PDF document text
    • http://dopenukivo.22web.org/xurogiberu.pdfIn PDF document text
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/a23b619e365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_602f2375c3252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450513/normal_60253f54e3c71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371523/normal_5fd06ec30b2f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fd7b3f33da5d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kodosalepixalan.epizy.com/get_your_guide_rome_reviews.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A7 5484 bytes
SHA-256: 570f843f8324f51d038f0a1436dd7d5649e0fa37ba90a4f7f5a2dd119ea810d1
font_01_sfnt_off0000f34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34F 11668 bytes
SHA-256: 25071fbf753fca5c0189c444bdfdd826dee74818cebfe7c82c040b80cbfd18b4
font_02_sfnt_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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