Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d47f390cd165ec3…

MALICIOUS

PDF

80.0 KB Created: 2021-03-12 19:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8579df781d3658fe30498f6dda6a07e0 SHA-1: 5bddcbe89f1643f34f53e9c6eaae60e73afce71c SHA-256: 5d47f390cd165ec3732f9e3c8d6a7dbaba848c021ced858e5a4932a0a09ef908
186 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=solar+system+project+rubric+for+6th+grade PDF link annotation
    • https://ralutadepijug.weebly.com/uploads/1/3/5/3/135305627/larekom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454419/normal_5fef96e7c3f70.pdfIn PDF document text
    • http://zukoretevir.medianewsonline.com/54694428291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391620/normal_5ff55b305ddc1.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/top_10_items_for_wilderness_survival.pdfIn PDF document text
    • https://resigigemi.weebly.com/uploads/1/3/5/3/135326159/fuwofuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_600d4ad309abd.pdfIn PDF document text
    • https://samazixudoreput.weebly.com/uploads/1/3/2/6/132681586/9539863.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_5ffbebf15d05c.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/forovemiguvu-dozamogurukal.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/daxemo/bodyguard_movie_songs_malayalam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0f77cd-0a46-487f-a578-be47d554a1ee/jufuxagatire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d57f96-33d2-4baf-a65a-214ff7a2cb2d/jafuroxiwuke.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/banner_crafting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ddd152-9b7e-4a7d-93ed-ab5cb1093728/what_are_the_44_sounds.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/coliformes_totais_o_que_so.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b725452-605d-4cf0-913d-b5c9ffa322c8/the_secret_life_of_pets_2_full_movie_download_in_tamilrockers.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_off0000fad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD8 6144 bytes
SHA-256: 582f08621cec4e972f5c16a6c8f7ed582d96cc116702df9d6df6075d15376fac
font_01_sfnt_off00010f9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9A 10376 bytes
SHA-256: c7c777e58e257b89ab4377ca19bf1ec2bc78eead417e8e498332f48b70ed7156

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