Malicious PDF — malware analysis report

Static analysis result for SHA-256 b396369f5ef97899…

MALICIOUS

PDF

78.0 KB Created: 2021-03-29 20:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8bb59445b233d4be0815ef64bc47fc6c SHA-1: 53aaea1e0ae4b6e7b769805cdab23e70db4aa197 SHA-256: b396369f5ef978996bd46ba15997c7fa3d9ae87a9445b5f9d70ed38d42a5f256
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://fokemale.ru/strik?utm_term=what+is+candle+magic PDF link annotation
    • https://cdn.sqhk.co/bidelefo/5L42vuM/speedometer_app_iphone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/jhPkhi4/jumofipofaxejepu.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvibabezel/P8sQheA/92746022085.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/hvVjajh/kinijatibupaxivawafo.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/vutame/international_law_university_dubai.pdfIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_d9cc8ca29e5d4a19a443c00974731d51.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_0be4af023ca54d468fbe8f8edfd5f9c1.pdf?index=trueIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_5551bde58b9941a19f09fc111383ecea.pdf?index=trueIn PDF document text
    • https://30dce114-5b7d-4ba4-aa44-e083516804ec.filesusr.com/ugd/7de0fd_49cc7922e30c435fb48fae65c48a4437.pdf?index=trueIn PDF document text
    • https://53ebb62d-ddaf-432f-8dc3-1f4746653467.filesusr.com/ugd/bbd3cf_34f4476659354115b0dbba59332ee47b.pdf?index=trueIn PDF document text
    • https://6ce95562-7558-49ee-a7b0-b3003db3b0e9.filesusr.com/ugd/d13e1f_529d754702c84858893dac0656914de0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9db489c-1bcd-4bb7-b253-353e545f996f/california_objections_to_deposition_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/list_of_automobile_manufacturers_in_india.pdfIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_0cef02b3f26e44778bb9ffc495d79f10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vapite/80362003886.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/numenuxanipezasatorelaliz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fefb0d0e-d2ec-48dc-a37f-fe0e89239aa7/lord_of_the_flies_chapter_9-12_vocab.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/xobatobovaditemejitobe.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_0356345afb1e4737b3ee83559831a637.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gateme/best_message_app_for_android_2019.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_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 5272 bytes
SHA-256: 67c4a5ae512865e10e9407ec0d2f4c3d98cf4ac032ab24033a34e7d701fde36e
font_01_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 11328 bytes
SHA-256: 0520e317a068c6cc7847a7e91c669c97e43c758b65e21ec32c4522d2351e0696

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