Malicious PDF — malware analysis report

Static analysis result for SHA-256 586587299b1a965b…

MALICIOUS

PDF

85.4 KB Created: 2021-03-09 05:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fba50b9e3946b112780dac877c117448 SHA-1: 665f50e81d7ee5d2d65a4e9a079c5947192dcaa3 SHA-256: 586587299b1a965b14ccf844f453f61b91ae0ec10b17ba10af48bd112bacacc2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The document body, though heavily obfuscated, suggests a lure related to 'sociological approach in literary criticism pdf', directing users to malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/award?keyword=sociological+approach+in+literary+criticism+pdf PDF link annotation
    • http://magnitoli-2ekran.site/fedoxojufhcah.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/gukegibomij-dufekowufomot-vanotu.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/kagidumazixipukoj.pdfIn PDF document text
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/gebupimobaxidegotat.pdfIn PDF document text
    • http://redtea.space/71744756889td7v6.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/saduvosoliwopa.pdfIn PDF document text
    • http://kvyovk.xyz/konekanosinisovajef93si.pdfIn PDF document text
    • http://dfwshootersupply.com/world_war_z_2_full_movie_online_123movieswpvm6.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/pikilasavo.pdfIn PDF document text
    • http://loxamukuk.22web.org/41886940662.pdfIn PDF document text
    • http://mebel-albero.ru/56312389761iekh6.pdfIn PDF document text
    • https://taxezuwijukiwum.weebly.com/uploads/1/3/1/6/131606901/kuxiza-kiserekejek-fewibupe-rakalo.pdfIn PDF document text
    • http://fruitnaturs.space/18693943003x74lq.pdfIn PDF document text
    • https://baboromet.weebly.com/uploads/1/3/1/6/131606353/zapuj-netipuwide-murogelugiririp.pdfIn PDF document text
    • http://help-copyrighteamservice.com/infectious_mononucleosis_rash_after_amoxicillin5z0av.pdfIn PDF document text
    • https://xikaxuroloxo.weebly.com/uploads/1/3/1/4/131406092/ad8be395533e9b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://negumigimewote.onlinewebshop.net/how_to_write_a_movie_story.pdfIn PDF document text
    • http://nojimaduxonariz.rf.gd/bipevokirewetiduwigoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6107d3ff-3b7e-4f8f-bd5e-3f89224d61aa/sedamusi.pdfIn PDF document text
    • http://fizufizobizud.epizy.com/zedubujike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15351554-2fb2-4a73-a0f6-625afb00f797/lotro_a_cold_trail.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a7481f-1072-4f85-92a3-cae121ff4d54/53647700912.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/ayurvedic_dosha_questionnaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa782f57-0004-45ac-a499-517e4496faa9/tazetisavaxes.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_off0001114b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114B 5776 bytes
SHA-256: 94ee8a798b6d9b722450897fb8ffd835b3d8a6d3e70f7151592295688cc7819e
font_01_sfnt_off000124d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D6 10228 bytes
SHA-256: 574cf6d0dda7d4d4a3c498daabb0749d737ba7bead897627322c550a6386b5d2

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