Malicious PDF — malware analysis report

Static analysis result for SHA-256 702b7678b9118d03…

MALICIOUS

PDF

84.1 KB Created: 2021-02-21 16:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eda16ee322593dd4f10e4bff34feda5d SHA-1: bf0fe177d2cf5020be3e547f4c470ba557aff6b2 SHA-256: 702b7678b9118d0302d1a853678ea091b202ee7140a34046a3182ed0b9e9f42c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, masquerading as a vocabulary worksheet, which is a common lure for phishing or SEO spam. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links pointing to external sites, many hosted on disposable domains. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, which could be used to facilitate redirection or exploit vulnerabilities, hence the inclusion of T1059.007.

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://bologen.ru/wix?keyword=ancient+rome+vocabulary+worksheet+answers PDF link annotation
    • https://zotepuzexalebox.weebly.com/uploads/1/3/5/3/135397030/novumexo_mulumawuva_tuzegufotefi.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/dadives_fuvofobogo_busejolujaraf.pdfIn PDF document text
    • http://1cats.space/afk_arena_best_heroes_september_2020sl96o.pdfIn PDF document text
    • https://vopisozojozesa.weebly.com/uploads/1/3/1/4/131407388/figesidolelux-kutazisixutezas-vajiwofavovemu-mexed.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/8221242.pdfIn PDF document text
    • https://konilusikiwi.weebly.com/uploads/1/3/3/9/133986353/ff077d686c569e4.pdfIn PDF document text
    • https://gejixivipoza.weebly.com/uploads/1/3/0/9/130969358/vexar.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/cggQ6hb/zaminuzizimexunibidumefe.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/cniez04/66739989048.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/fusezugisopa_zebalikez.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/c87304fa185545.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/semofejadozejetiv.pdfIn PDF document text
    • http://closemaze.com/xuwedo3urpm.pdfIn PDF document text
    • http://winfreeiphone.xyz/freeport_offshore_weather_reportzvo5z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 5488 bytes
SHA-256: ad2cc83f2b2b7c639cee13877c8bdf8bae846b689b835c2899e9f54ed92f3901
font_01_sfnt_off00011ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF2 10240 bytes
SHA-256: 1b7b9bcc49ee08614dd9232a59080f8570b377ec14d95753e7df704bdc218bbf

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