Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa40b23742a8894…

MALICIOUS

PDF

77.6 KB Created: 2021-03-24 16:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 727f64c55f4492d6a384ad10b9d57cb3 SHA-1: b34ecaa9125c753e1a31d51a8e3fa4ff03854255 SHA-256: daa40b23742a88947656d90f418414f2980fdd041fd5b9c0027c44f816cfd326
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to a suspicious domain. This suggests an attempt to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jumiwimov.ru/aws?utm_term=how+does+lord+of+the+flies+represent+war PDF link annotation
    • https://mefirotevi.weebly.com/uploads/1/3/5/3/135314773/c4e1e6bc31196d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388626/normal_5fc9594e4b987.pdfIn PDF document text
    • http://vittorguxx.site/99572908773fwx6k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_6032c3d81b058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5ff401ee917ce.pdfIn PDF document text
    • https://mipajadotafev.weebly.com/uploads/1/3/2/8/132814286/235812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379851/normal_603ed30aa12ba.pdfIn PDF document text
    • http://tegor.xyz/effective_communication_techniques_in_the_workplacekezvy.pdfIn PDF document text
    • https://kesizizuju.weebly.com/uploads/1/3/4/3/134384541/zesavubalu-gusizujugowo-tugubinuxub.pdfIn PDF document text
    • http://serdyukov.pro/zunebilugufivisosb6sqg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e089f5f-fdd9-484f-b042-be8cdf94dabc/topegopuzozebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/572b81cf-b62e-4eaf-b753-642495d8c19e/daisy_miller_a_study_in_two_parts_by_henry_james.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67c6357-6ad3-4273-880c-f272c8f947ec/dusupap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7098364b-7d32-4952-8754-296d18eeefea/pokemon_adventures_manga_vol_3.pdfIn PDF document text
    • https://471876dd-1950-42f1-a4b7-18bccbaeda70.filesusr.com/ugd/5d8976_7f0a0773a4d34eacbabd1ebd6a4c693e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ca85849-39d4-4285-9238-08650de097b4/aa_step_12_explained.pdfIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_747de74b28d74ce48d35afc1610b748e.pdf?index=trueIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_760044341be7478bb16ce23d81b41674.pdf?index=trueIn 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_off0000f157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF157 5180 bytes
SHA-256: a2eaa0211487b2a2ce9d66c4e7aa3c28d367133b8a0cc96b170dd393e2788f79
font_01_sfnt_off000102ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 10524 bytes
SHA-256: eef4e5181faa1759a93d72aa339b3878c4dc8cee41d0d9634b9bcdaebe582aa5

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