Malicious PDF — malware analysis report

Static analysis result for SHA-256 490cd124a5ba4b5b…

MALICIOUS

PDF

78.3 KB Created: 2021-03-19 00:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1caf179ebd3a6159eb603526f4ab33f SHA-1: 13e4fe7c71d59e82bbb277720b68340f76b8b000 SHA-256: 490cd124a5ba4b5bd130350d04fe88d42a07c23dd6b3a292a943f2dd3dd42383
196 Risk Score

Malware Insights

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

The PDF document contains a lure related to a housing program and includes numerous external links, indicative of a link farm or phishing attempt. The presence of a PDF_SEO_LINK_FARM heuristic and the ML classifier's high confidence score suggest malicious intent. The document likely aims to direct users to malicious websites for further exploitation or scamming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jacksth.ru/wix?keyword=mbq+housing+program+baltimore+city
    • https://cdn.sqhk.co/bisidilit/g3id3y5/pusuwexumisagaw.pdf
    • https://cdn.sqhk.co/xubipoxeguza/7jjgcTl/31697222087.pdf
    • https://mosuvixixe.weebly.com/uploads/1/3/0/9/130969854/dalometugeji.pdf
    • https://faxojoduso.weebly.com/uploads/1/3/5/3/135351685/kejopowopubiwirenike.pdf
    • https://cdn.sqhk.co/fusifanux/heI4Jkm/elements_of_art_shape_and_form.pdf
    • https://cdn.sqhk.co/tivuzofep/ZT1dKvz/mechanism_definition_engineering.pdf
    • https://cdn.sqhk.co/kivipemo/Dvidgjl/android_nougat_32_bit.pdf
    • https://cdn.sqhk.co/raxoxawupej/ihF5OSt/lasership_locations_pa.pdf
    • https://cdn.sqhk.co/juxerawabuf/M0giApc/download_permainan_sweet_fruit_candy.pdf
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/3699f.pdf
    • https://dibetoxiruvon.weebly.com/uploads/1/3/5/4/135400859/gigupi.pdf
    • https://cdn.sqhk.co/ranetixeba/YibMznH/36684340533.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3044b576-468d-4504-b096-6d48b18471aa/how_to_use_blender_for_animation_in_hindi.pdf
    • http://witopovuketoj.epizy.com/xopikurewabanap.pdf
    • https://uploads.strikinglycdn.com/files/952db167-08e4-4694-a05d-b842fd397ac6/sobotitebitetoxavewa.pdf
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_bda9a0ad52974f49aa55f29944315773.pdf?index=true
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_8a1001ffb054455ea1ac3d4bb7079bdb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f07c9320-c16a-4244-8b0b-dfd6d848425f/buy_all_american_pressure_canner.pdf
    • http://maviwapas.epizy.com/kaththi_villain_theme_music_320kbps.pdf
    • https://uploads.strikinglycdn.com/files/6f38c5c2-5389-41b3-a404-f59e7f20f1eb/cybex_arc_trainer_630a_manual.pdf
    • https://uploads.strikinglycdn.com/files/e607d65b-5013-4258-af91-362c381ec138/lifonefavuguxekufalo.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_off0000f184.bin
d83835e0103a152e4499bd9832979e8767fb27042a18c52ff85e1a57dbf3112f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 5720 bytes
font_01_sfnt_off000104e1.bin
6a7de79ee852b4efa8b9200db47abe0db3d6c7aa21229d2bdcc9a305f12bd285		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E1 11452 bytes

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