Malicious PDF — malware analysis report

Static analysis result for SHA-256 7073b6465232d6da…

MALICIOUS

PDF

76.0 KB Created: 2021-03-29 11:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 039a88c5aed39a0a2898bc16d1b21e03 SHA-1: 5eeae964f6709ac6dce219bf37419c35165aad7f SHA-256: 7073b6465232d6dad92ce5adf4f869f80c09f7143651b5e8fbbf84079995b184
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of a URL like https://mezovuduw.ru/wix?keyword=standoff+2+mod+apk+unlimited+health indicates a lure for potentially unwanted software or malware.

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://mezovuduw.ru/wix?keyword=standoff+2+mod+apk+unlimited+health PDF link annotation
    • https://cdn.sqhk.co/bebumula/jhbnVet/lozawelefozepegiwulig.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/pekujanufakivtokf.pdfIn PDF document text
    • https://wanalupegekiful.weebly.com/uploads/1/3/4/8/134879682/duzexo-fikugoxif.pdfIn PDF document text
    • https://vodemiteju.weebly.com/uploads/1/3/4/7/134722100/tilutu.pdfIn PDF document text
    • https://wipigoxexidon.weebly.com/uploads/1/3/2/6/132682030/wefokurokonate-gaxaxew-busupupowibog-kolalatata.pdfIn PDF document text
    • http://covid-19online.site/zazarujakufikobadasonudu5dz4i.pdfIn PDF document text
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/6580575.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/hhhrG25/gmail_app_download_for_android_mobile.pdfIn PDF document text
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/wozisoke.pdfIn PDF document text
    • https://kumajevebak.weebly.com/uploads/1/3/1/8/131856027/7910450.pdfIn PDF document text
    • http://lesantyqas.online/inspired_education_inc_answers705sh.pdfIn PDF document text
    • http://fimewot.xyz/vidmate_app_free_for_android_uptodownoww9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nazonuretowu.epizy.com/4867972012.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/mamba_monster_2_manual.pdfIn PDF document text
    • http://rebipilu.epizy.com/what_does_the_choke_on_an_engine_do.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/joxamukikugegejujajujag.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/82390461325.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_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 5304 bytes
SHA-256: 075c2e4e379e08617ba4988456823e82e2031dabad4cc1e4b5d995bd639ebce4
font_01_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 10828 bytes
SHA-256: 3740e99ea3fa40d0f253a4723dc9e4ab43fc916d4f730ff422492dc68bf22c51

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