Malicious PDF — malware analysis report

Static analysis result for SHA-256 425580b0696e521e…

MALICIOUS

PDF

80.5 KB Created: 2021-03-15 16:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e753d4d3fa8e93c2e5987a2d6f1df141 SHA-1: dba3195b17a5c427243852b3aef61271b1544d12 SHA-256: 425580b0696e521e1ddb22c1e8ba1b0eaf07cd6175a63c3ab4193613683e7d34
112 Risk Score

Malware Insights

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

The PDF contains an embedded URI that leads to a lure related to 'aptitude test sample questions'. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of multiple unknown reputation URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=aptitude+test+sample+questions+and+answers+pdf
    • http://bosnoslovnoejelaniekupit.xyz/house_music_90s_r_b7t3ji.pdf
    • https://cdn.sqhk.co/wofikubid/ggbIhgc/home_assistant_docker.pdf
    • https://cdn.sqhk.co/nujekezitifi/sBgjghI/8780069062.pdf
    • http://aov.one/36354475130y2ndp.pdf
    • https://cdn.sqhk.co/pajokiman/hFje5jj/76796948591.pdf
    • http://chestlune.online/nonviolent_communication_training_online0enhi.pdf
    • https://cdn.sqhk.co/jijipidub/iaghnhc/91492367663.pdf
    • http://zexofezureza.iblogger.org/71661268401.pdf
    • https://cdn.sqhk.co/suxujaba/X8jdhfP/iot_architecture_for_beginners.pdf
    • https://cdn.sqhk.co/kajipazuto/Fijjcgg/into_the_dead_2_pc_gameplay.pdf
    • http://jaditifesan.22web.org/best_football_training_app_for_iphone.pdf
    • http://sevelorovuwo.66ghz.com/how_to_connect_hp_deskjet_2620_printer_to_wireless_network.pdf
    • https://cdn.sqhk.co/lirebirab/6ckciaN/xanizefitapapijela.pdf
    • http://itclick.info/saab_bahadar_full_hd_movie_moviescounterc1uep.pdf
    • https://cdn.sqhk.co/zubavagi/ihsgfgh/29026330188.pdf
    • https://cdn.sqhk.co/kakapoxavu/ijpjbu2/pathogenic_bacteria_are_capable_of_causing_infection.pdf
    • http://vorgazme.com/how_to_thanos_snap_googlefquwc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zevazunepig.rf.gd/openssl_crt_to_pem_format.pdf
    • https://s3.amazonaws.com/pidufozu/lomotikozexirilevoma.pdf
    • http://totexamivemasal.epizy.com/polaris_iq900-rs_aqualink_upgrade_kit_rs_systems.pdf
    • https://s3.amazonaws.com/xuzed/19975153949.pdf
    • https://s3.amazonaws.com/jawusawar/manumujilepovudew.pdf
    • http://tirujukixiw.epizy.com/nintendo_wii_u_cheapest_price.pdf
    • http://nekaxikafixof.epizy.com/bihar_ke_gana_ing.pdf
    • https://s3.amazonaws.com/benuka/febagotawaj.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_off0000fc41.bin
ed756bb8b67e03bb7c58bb9770bdd6bf00857f01ffdf4354b793af5010f443ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC41 5396 bytes
font_01_sfnt_off00010e94.bin
79d745a13cdb8a4e4e7b7594e952c5e66ab7eb8a8bd84976f964b952bdd740cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E94 11032 bytes

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