Malicious PDF — malware analysis report

Static analysis result for SHA-256 1865eeaa18ee0ec0…

MALICIOUS

PDF

102.7 KB Created: 2021-03-21 01:50:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e6819526539352fc4ce8ef2b598baa94 SHA-1: 17545c69fe386d6dad21511ec7ef20058bc1f610 SHA-256: 1865eeaa18ee0ec0381cf6c610dadf3856cba02f6ffbe233df9966b029b80b81
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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 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://resalured.ru/award?keyword=aliphatic+amines+pdf PDF link annotation
    • https://cdn.sqhk.co/kanereneb/gsl5sih/javogisizusapewireruxur.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/pebokexewazumiwi.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/7564775800.pdfIn PDF document text
    • https://cdn.sqhk.co/supekokabe/4KzAhgX/5379930878.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwokosokif/EuzihKZ/balwan_film_video.pdfIn PDF document text
    • https://cdn.sqhk.co/xujurovemu/ha0igjb/feudalism_in_japan_pyramid.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/xowizudegametar.pdfIn PDF document text
    • http://kevarusakoko.mypressonline.com/jedomajijizojemabasumixob.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/where_can_i_buy_sodastream_co2_refills.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a5616b-1093-4fab-a7a2-dfeb333bfc24/per_capita_income_highest_in_which_country.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/take_five_candy_bar_nutrition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81dfa07b-cb79-46a2-aef6-e51a958554b0/49874556030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80f30f0-289f-401d-9596-ba050be71bfe/best_reloading_manual_for_handguns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e35f5256-3f7a-4f90-a7fa-5ee5b8d3bc61/83721371818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f3fba02-33d6-49f6-8ca7-3792827a950f/fojugotatezatimubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2510a8-44fe-4855-8a28-eee4ede9bc81/96038412250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac7d8d4-71c5-4517-a36e-b91c47a85626/16803091766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c4a3724-dfb6-444b-8b1d-5970fc071d6a/arris_tm502g_ip_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7548de55-755d-4841-83e5-7f4461701fbe/7804630262.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B0C 5288 bytes
SHA-256: 708fc04eb2d3b3fecdb7266e2f6fa986e39ee3831a3b7d0803bc3c415d1e21c2
font_01_sfnt_off00013ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA6 6300 bytes
SHA-256: 89366ea4ac065d5103f8bf5c0489947bae71aa25e58d5e288e2cfde55b9231a0
font_02_sfnt_off00014c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C01 13424 bytes
SHA-256: 0c026b4d83769182104de264528a389f3c1b2c6988949b7f702ad93e20ed43a4
font_03_sfnt_off000177a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177A9 16148 bytes
SHA-256: dabb93666987ee423f87fdf6909b489623d3b8141207251f09067def549156d9