Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a987fc62372207…

MALICIOUS

PDF

85.5 KB Created: 2021-04-29 10:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: beb634936ddae023a050bc3bdbeb2461 SHA-1: 5b6e8a924108104a43e204b6314f6984e2f0c3d4 SHA-256: 30a987fc623722070ac5eab340cc7b51c5e9ef1caa215e14c2241fe0c30e8900
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 0.9996

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://crophysi.ru/strik?utm_term=precauciones+de+administracion+de+medicamentos+por+via+intradermica PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485166/normal_60290c5d8e73b.pdfIn PDF document text
    • http://lunagogafoxoj.sportsontheweb.net/25154443462.pdfIn PDF document text
    • https://geduwitanezuter.weebly.com/uploads/1/3/0/7/130738684/1732455.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411498/normal_5fc60571954cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_605aaedd93fac.pdfIn PDF document text
    • http://rezisekuvaz.mypressonline.com/velidifavudupefowatil.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/probability_formulas_sheet.pdfIn PDF document text
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/0dfeb25eaf68d4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448744/normal_5fc740106944a.pdfIn PDF document text
    • https://diwodineguxep.weebly.com/uploads/1/3/4/3/134305573/vefonotarowew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458132/normal_5ff01fe5bde66.pdfIn PDF document text
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/4ffba368576.pdfIn PDF document text
    • https://kigotofu.weebly.com/uploads/1/3/5/3/135323523/1909629.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://170d08c7-2527-4f8e-8bc4-cf7f6ffab704.filesusr.com/ugd/afe24e_4bbe4d7cbb7a44409683dabc54fc86df.pdf?index=trueIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_f91113c333784bf78c77496b15e83880.pdf?index=trueIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_43b517c412b9432797762e9535f78d99.pdf?index=trueIn PDF document text
    • https://245df057-3761-468b-8bc4-2c9c6734f7c7.filesusr.com/ugd/06c8e1_46d9fd4aa22344ac98a2221d22527a1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/chocolate_box_normal_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/how_to_turn_on_jam_hang_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/67975016875.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/antologias_de_terror.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_off00010d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7E 5248 bytes
SHA-256: 5846a012297aa44f73d0d25f1a6ab79a35fec1685a422d6a8d3c73912027260c
font_01_sfnt_off00011f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F43 12008 bytes
SHA-256: 22536d18466d9f881eaa6e4737462592f18d3ad0c68a3904821dbd3afc672ea7

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