Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2b23b19d6b21ff…

MALICIOUS

PDF

70.2 KB Created: 2021-02-17 06:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9548d6b84d89f8f0245b903dc2007a60 SHA-1: de296c0088cbb4cfbf72ce009f2446bf6de21b08 SHA-256: 8b2b23b19d6b21ff386d28390d7f759286b69a878a12c76821e429857e777a39
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spamming operation. The primary URL, 'https://maypoin.ru/aws?utm_term=what+is+acca+salary+in+india', is presented in a way that mimics a search result, likely to trick users into clicking through to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

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 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.
  • 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://maypoin.ru/aws?utm_term=what+is+acca+salary+in+india PDF link annotation
    • https://fuwowomazusora.weebly.com/uploads/1/3/4/0/134000162/xirokovon.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/5954355.pdfIn PDF document text
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/c77a192cc32e43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404503/normal_5fd045e897268.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/GEu2Xjb/45807450467.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/3d110213abd0.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/MX22jht/saralapagagi.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/Ljdjfm3/get_lucky_daft_punk_lyrics_and_chords.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/fejenijovekozu/90629106511.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/ejercicios_de_carga_electrica.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/agricultural_engineer_cv_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/boot_camp_assistant_6._1._0.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/ammoon_pockrock_manual.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

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_off0000d58a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58A 5144 bytes
SHA-256: b307b70d1568321053282c963a4a52abd783f5a8a7035c53231ac1a0bf837902
font_01_sfnt_off0000e712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE712 11004 bytes
SHA-256: 97a6a279e820ce8243a96b02c674f330e9622db9fe0ac15417ac29e52b3257e1

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