Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a554a044393d252…

MALICIOUS

PDF

87.2 KB Created: 2021-03-15 03:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0793bc86c5eb48911e959a59d03c989 SHA-1: 7111d7a1dd64253e1ba7b4b40c201efd7874c99b SHA-256: 1a554a044393d25255f88a52fbb107c0f8e9cd3156dd9112cbeaec97e6261dba
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'ap chemistry molarity worksheet answers'. No scripts were extracted, but the presence of an external URI is a primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=ap+chemistry+molarity+worksheet+answers
    • https://cdn-cms.f-static.net/uploads/4402488/normal_60473600d27ae.pdf
    • https://cdn.sqhk.co/zudilubal/LwOwigT/rewirikemedonilu.pdf
    • http://lnstagramcopyrightmanagement.com/android_tv_devices_australiaqt4ph.pdf
    • http://wezenilokiwuv.iblogger.org/artificer_gunsmith_5e_guide.pdf
    • https://cdn.sqhk.co/sexuzoropa/J7Pgh2Y/hot_wheels_id_app_compatible_devices.pdf
    • https://cdn.sqhk.co/tezejikibus/kQ5ODrH/7346645227.pdf
    • http://shopwithsale.website/pokemon_sun_and_moon_gba_free_download6f445.pdf
    • http://towajemikof.iblogger.org/39897276300.pdf
    • http://inostrana.com/chakras_in_bodyli9bt.pdf
    • http://cmb-societe.com/befapebidadiwobixuzupalxdq59.pdf
    • http://naturebiolog.space/vitosunapnha4.pdf
    • https://cdn.sqhk.co/pubamegumox/a9XjhTe/wildflower_song_5_seconds_of_summer_lyrics.pdf
    • https://cdn-cms.f-static.net/uploads/4470211/normal_5fd34df6bbdc0.pdf
    • https://cdn-cms.f-static.net/uploads/4451044/normal_602ac9afaa38b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xegeduv.rf.gd/what_does_the_gang_sign_four_mean.pdf
    • https://uploads.strikinglycdn.com/files/82004eb3-4bf4-4195-aaa5-468a8a154b76/xuvulisidofuzam.pdf
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_2142a04178644a9ba7c754595001e092.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6d3d879f-4dcd-4430-84da-009c5e91a321/classical_indian_philosophy_a_history_of_philosophy_without_any_gaps_volume_5.pdf
    • https://uploads.strikinglycdn.com/files/a7bb0bfe-a62f-4915-b8c6-e0889d4b2842/95683119788.pdf
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_e4f1d35a8aa44a52ac147ec07d6c74e8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/bffbd1b7-b21d-4f7c-bc39-6a41cc3eb2b5/gulerutulikenawiti.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_off00011564.bin
b9624080d1cb0e3129e783ef49203eeb102b4ecc9d968177d3ed80bcd01e7e25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11564 5420 bytes
font_01_sfnt_off000127bd.bin
f4434e9f3af07882b64b9f5374d65572af11656a1cee9bfb5488cdb78cf19cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127BD 12160 bytes

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