Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd79e60d3f7f8f2f…

MALICIOUS

PDF

79.1 KB Created: 2021-02-24 01:53:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5679a2848fc645be3eb589a9eb3c1dfa SHA-1: 3e26307ae37da3532b87e65b9f662e9aa060f818 SHA-256: bd79e60d3f7f8f2f38725b4535d8d063ddcfaba1ce944238bc3dc693a7fcb15a
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, appears to be a lure related to 'Harry Potter mini book covers printable'. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful sites.

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://baarspo.ru/aws?utm_term=harry+potter+mini+book+covers+printable PDF link annotation
    • https://cdn.sqhk.co/moturalogupe/hfibE2C/taponuzudoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385207/normal_5ff12cf311baf.pdfIn PDF document text
    • https://jitivafume.weebly.com/uploads/1/3/0/9/130969372/lajan_nimurokak_borewixase.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/heIjbxe/slice_of_heaven_bakery_jamestown_ri.pdfIn PDF document text
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/datama-xofijomutetesej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372673/normal_5ff5b1e4e8a51.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/jiN6jaj/all_10_billion_husbands.pdfIn PDF document text
    • https://cdn.sqhk.co/govulasem/xidgYge/discover_mobile_app_developer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_602450c9df3a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489407/normal_5ffe727d140ee.pdfIn PDF document text
    • https://gudabujazoz.weebly.com/uploads/1/3/0/7/130739385/2140119.pdfIn PDF document text
    • https://fefujosiniw.weebly.com/uploads/1/3/4/8/134862858/4426df7.pdfIn PDF document text
    • https://ditixalopu.weebly.com/uploads/1/3/1/4/131410538/tapugovobog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_600f810750d10.pdfIn PDF document text
    • http://zuxunolenodo.22web.org/bufuniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_5fe90da8605fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://telatojewoka.epizy.com/62348394687.pdfIn PDF document text
    • http://rexawisoza.epizy.com/how_much_does_a_systems_engineer_earn_in_australia.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_off0000fa11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA11 5404 bytes
SHA-256: 95b9677743899f0c395d3dbc477217904ef65a7c888ed3ffb98791960ddace4a
font_01_sfnt_off00010c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 10332 bytes
SHA-256: cb15a9ce0a4b94394953fed5e1b99f305cae7777cdb7fa3bde49d3d2a0370aef

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