Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c47401c14c5e69a…

MALICIOUS

PDF

83.4 KB Created: 2021-04-14 23:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f8a44e950183a98eabed66969086e955 SHA-1: b1a380ddf12eae23534c228552a4283a46b36fc7 SHA-256: 1c47401c14c5e69a13b8db1fb91a898b03217ead6ec935783c41d600346f3e66
136 Risk Score

Malware Insights

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

The PDF document contains a lure related to resetting a home security system, which redirects to a suspicious URL. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The presence of embedded URLs and the nature of the lure suggest a phishing attempt or a download mechanism for further malicious payloads.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/strik?utm_term=how+do+i+reset+my+dsc+home+security+system PDF link annotation
    • https://cdn.sqhk.co/sononipo/iiQJCjf/guliboketezorifesu.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/f6Fhbgd/fozabepulofujerexurup.pdfIn PDF document text
    • http://bererudi.22web.org/centrales_electricas_en_venezuela.pdfIn PDF document text
    • http://wakinozogedix.iblogger.org/53996043556.pdfIn PDF document text
    • http://fusizexa.22web.org/ascariasis_tratamiento.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/jfam1Kp/mexican_liga_mx_league_table.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/mejawiwomak/47870225285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab9dc9a6-d802-4bac-9785-b557ef786ddc/xabomo.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/xozedojazerakoxetebag.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/pokevumi.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/nonojitanawefivebu.pdfIn PDF document text
    • http://bajipelorisu.rf.gd/63798581325.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/21358219624.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/bulgaria_visa_form_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b03a9414-78b4-41e2-98b8-7982a0a9550d/how_to_unlock_whirlpool_duet_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119a873d-55cf-44e2-b748-13fb0b0fc2ff/the_care_and_keeping_of_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48255b5-9584-46dd-aaa3-dc2bfa492766/best_whole_house_standby_generator_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/arduino_adafruit_neopixel_library.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218f9d06-09e3-4040-abf6-748799166d9c/wordpress_force_download_link.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/luwatabatomeledog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633ecc80-16ba-4fc8-958e-768756b8068c/gospel_of_the_holy_twelve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7845ab30-d1b6-4d75-95ac-9800e63d16ca/how_to_fix_printer_offline_error_hp.pdfIn PDF document text
    • http://limazajot.rf.gd/39686048771.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/analysis_and_design_of_algorithms_notes.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_off00010888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 5092 bytes
SHA-256: 82587698a397346f0ceb5a1caa97e4d6654ec23ac8fb5d1377bd092dd3d374e9
font_01_sfnt_off000119c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C5 11172 bytes
SHA-256: 2f9861e8eea9d8801ba4c61fb835d021a43921bc1546aa07003c2b9f1ed9dd3f