Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d52d88983b3097a…

MALICIOUS

PDF

76.9 KB Created: 2021-06-07 21:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 713319be382248d70808b473270daf05 SHA-1: 464de8896ddbd7575cd364b3406890a0fb153477 SHA-256: 8d52d88983b3097afb8ade788bab097b92440a0992b54e26d528aef18422759e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://infrive.ru/pbw?utm_term=how+much+does+a+hang+glider+cost PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480589/normal_6028c44be9c26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_5fdb839ac7f34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5fcccf0c7409b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4488592/normal_60b1ebfeba226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_60204359d456e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_603164a6e0ac4.pdfIn PDF document text
    • https://verakolor.weebly.com/uploads/1/3/1/3/131379730/razawik-bufumi-narozoxupuxovek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495974/normal_5fdc653818139.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/ritoju.pdfIn PDF document text
    • https://papilezuserif.weebly.com/uploads/1/3/4/4/134437149/3243885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489251/normal_602799eda2ee2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5fc56985-2d28-42a0-8263-31c26eda734b/6957371454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9933d873-a300-4714-83ed-f6dcf8480ea4/marvel_movies_after_avengers_infinity_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c357d12-6da1-4fd1-91d6-c5aaf6ca6a6a/breach_of_trust_law_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1e5e15-9686-4f83-ae51-6bb463564516/wasawupupexamuginoxinavup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea55330-5beb-440b-9e0f-612e05e515a2/jobotaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f558f7e7-6e64-45a1-8640-64390d91c3ec/the_best_mimosas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa8ea17-52dc-4c18-99cf-e2f985c5315a/49705176499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357077b1-9797-4382-8e4a-0d2e1d791533/resistance_band_core_exercises_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbf087b-3d41-489e-8c8c-432e205bc32b/19204655503.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 5288 bytes
SHA-256: c125bc4afab2f970124da965a61e4c5f94f58d13132476bdd260541413cfd119
font_01_sfnt_off0000f32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 10808 bytes
SHA-256: 076eefc501b4c742c5db52bf0c95f851aa1cb0421287eb5f851247228a6e592f
font_02_sfnt_off00011813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11813 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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