Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f4a6bdb58e5ac8…

MALICIOUS

PDF

86.0 KB Created: 2021-03-12 03:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1f0e16fe708b21ce7c45ffca15c3145 SHA-1: 489078ddbee7e2f3fcd267ff1c4cc8ab3d69cd69 SHA-256: 59f4a6bdb58e5ac8eb133b2236606037fb86a65a11caeba615d1f32aa1594720
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm. It contains numerous external URIs, with the primary one being `https://resalured.ru/aws?utm_term=mainstays+cordless+mini+blinds+manual`. The presence of a link farm suggests an attempt to direct users to potentially malicious websites, possibly for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/aws?utm_term=mainstays+cordless+mini+blinds+manual
    • https://nipawivas.weebly.com/uploads/1/3/2/6/132680981/fizosisifosa.pdf
    • https://static.s123-cdn-static.com/uploads/4374366/normal_5fcf32135b069.pdf
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/xesipipamupofo-furusofoxijat.pdf
    • https://cdn-cms.f-static.net/uploads/4417206/normal_604068fea84d5.pdf
    • http://goladelexugezi.sportsontheweb.net/29359209181.pdf
    • https://static.s123-cdn-static.com/uploads/4465264/normal_5fe3a0e01b5de.pdf
    • https://dedidolijara.weebly.com/uploads/1/3/4/6/134666782/noxoreforode.pdf
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/jezudujidulapuro.pdf
    • https://static.s123-cdn-static.com/uploads/4383918/normal_6007707300135.pdf
    • https://static.s123-cdn-static.com/uploads/4367947/normal_5fdef1b56d5a0.pdf
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/9c4d891eae.pdf
    • https://lidimegofomizut.weebly.com/uploads/1/3/1/3/131380930/juwolemi.pdf
    • https://suxegetolikas.weebly.com/uploads/1/3/4/0/134097713/6180625.pdf
    • http://zimezobot.getenjoyment.net/36840163846.pdf
    • https://gosawopidelogeb.weebly.com/uploads/1/3/4/7/134714887/0bb90a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zedudo/tijakejiwulexifidipo.pdf
    • https://s3.amazonaws.com/bipovoromoj/rebudujuba.pdf
    • https://s3.amazonaws.com/radubozufiwo/cell_structure_and_function_worksheet_part_a.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/messenger_android_4._2._2.pdf
    • https://s3.amazonaws.com/xakusineba/excel_vba_msgbox_drop_down_list.pdf
    • http://vesedakowata.onlinewebshop.net/74643149761.pdf
    • https://s3.amazonaws.com/nigimul/51709808599.pdf
    • https://s3.amazonaws.com/likerajatob/sopugadejizajokevufin.pdf
    • http://juludiripo.myartsonline.com/our_god_ultimate_guitar_chords.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011196.bin
f1d7584e81ec2e9bb6742fe5822bd728ae9426f75bfff5a63bc0e4768cbd7137		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11196 5332 bytes
font_01_sfnt_off000123ad.bin
ee97b8dc8a525ade98a3ce60b8ef51fb4f0d2c21f215b0864ca34c2538c9bb37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123AD 11428 bytes

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