Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a7c27d7bbfacb2…

MALICIOUS

PDF

76.9 KB Created: 2021-02-20 23:12:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2c8a53dad2090e347274d75a76f99a39 SHA-1: 47de2a6116064e44ec80998e002b6be82fa77e4e SHA-256: 76a7c27d7bbfacb22494b093066523ccc596f54a25c6aab41d037689025f59cb
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The primary malicious URL identified is https://maypoin.ru/strik?utm_term=my+genes+made+me+do+it+pdf+download, which is likely part of a phishing or malware distribution scheme.

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://maypoin.ru/strik?utm_term=my+genes+made+me+do+it+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5ff38a2405a1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375705/normal_5fe07084d38d6.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/hg5jhgi/impossible_bottle_flip_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bejamisokepu/0igjjih/how_to_bake_chicken_thighs_in_the_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/polopomoset/1dhihaG/47453349363.pdfIn PDF document text
    • https://wofexajolevesi.weebly.com/uploads/1/3/5/3/135302186/529747.pdfIn PDF document text
    • https://fepepifufom.weebly.com/uploads/1/3/1/8/131872298/32e62aca3d17220.pdfIn PDF document text
    • https://natulawud.weebly.com/uploads/1/3/4/3/134309077/409d95f9c1b3.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/heDcjbF/o_launcher_8._0_prime_apk.pdfIn PDF document text
    • https://womovenurobo.weebly.com/uploads/1/3/1/8/131872055/nutisok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448116/normal_60230b2c6e3fd.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluwumenad/iieifhn/broken_bones_compilation_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419433/normal_5fcf695a22fda.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/ZgeP9LF/make_ice_cream_in_a_bag_uk.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/rebomedug/59712548472.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/assam_bodoland_lottery_result.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/87630937304.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/libro_para_colorear_mandalas_apk.pdfIn PDF document text
    • https://medlineplus.gov/genetics/gene-i/fromIn 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_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 5464 bytes
SHA-256: 6f5264767ba39d86e5fc67dabc28e3c6d9a756080f57dd8695660eed69ec3815
font_01_sfnt_off0001016a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016A 11020 bytes
SHA-256: 15c6783177746b3a32339be74fc220b6dae64765cdb09e22b5048098c1c15cad