Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b18123310d4628…

MALICIOUS

PDF

100.6 KB Created: 2021-03-19 05:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 15753f7c3486067128c8fb4f8bd625d8 SHA-1: 93b0c06dd8824e9bc1f192e933a0d49d581c6d96 SHA-256: a2b18123310d4628d9ae6a0dfc68b168673a7a154b5a3d2e5e0ea74ad5af6759
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://druttle.ru/wix?keyword=dbq+electoral+college+answers PDF link annotation
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/ffa06387ae.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/boxaxamubizoxuvenulokokab.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/24710797613.pdfIn PDF document text
    • http://tojuvapemupo.mywebcommunity.org/66379746842.pdfIn PDF document text
    • http://mateguwokalidub.getenjoyment.net/28291147899.pdfIn PDF document text
    • http://vovuzug.22web.org/video_lirik_lagu_peterpan_yang_terdalam.pdfIn PDF document text
    • http://jukejed.mypressonline.com/jonum.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/witalanubagagikixebiwej.pdfIn PDF document text
    • https://xijofufakeziti.weebly.com/uploads/1/3/1/3/131380729/ddd71.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/vugubovamorexa.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/masevewi/metamorphic_rocks_meaning_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/878e6dfc-8141-4847-8f75-ea7abe035425/rogunufabeweratipapu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/menitadetevipinadiput.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/orcad_schematic_capture_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd53c202-ca6e-440e-885a-fb7a8139b21f/97263111135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2036e7-3cbb-446e-a338-17c3c92bace4/what_is_a_marginal_structural_model.pdfIn PDF document text
    • http://jewofeket.onlinewebshop.net/mst3k_outlaw_of_gor_song.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/empire_mini_gs_upgrades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de74378b-b535-4031-bf55-46b61b2b36c7/google_maps_satellite_view_antarctica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce256507-8d22-49c3-b2fb-5e5abe0e6537/kekaresimogesekufexapon.pdfIn PDF document text
    • http://piduboxekazawu.rf.gd/tufejowaxobilaregom.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F5D 5324 bytes
SHA-256: 313fd0acd87feeadc3a5ca6513ea27db4c4e082acb17e3f7b8a7f1a2c392d421
font_01_sfnt_off0001319b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319B 25700 bytes
SHA-256: f8d4e6d8372649c1440d64ccc3215f5b4cba1df8f2ade671dac9bc1f92f9e949
font_02_sfnt_off00016f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F8C 16136 bytes
SHA-256: 6af490f36ade80b569e67fbe94e0a50b64f90cd8ea12df023146ac196678d799

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