Malicious PDF — malware analysis report

Static analysis result for SHA-256 193f24fe92afe058…

MALICIOUS

PDF

74.7 KB Created: 2021-05-22 23:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f1998e5c5494e5f0bc30259089e83fa4 SHA-1: 1bde354be8a3ac914855fce2e1292f7f87d9dd7e SHA-256: 193f24fe92afe058387139a9c19813e94d505d04451e5f305dd9c503c5f1ee7c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://nipisod.ru/strik?utm_term=verificar+si+mi+imei+esta+reportado PDF link annotation
    • https://tubababekegoso.weebly.com/uploads/1/3/4/8/134880125/893ff1b071e7.pdfIn PDF document text
    • https://pinosapop.weebly.com/uploads/1/3/4/1/134131344/sijok-tojatenebu-diseteno.pdfIn PDF document text
    • https://momiretet.weebly.com/uploads/1/3/5/3/135345559/8433832.pdfIn PDF document text
    • https://kerixigepib.weebly.com/uploads/1/3/4/2/134235482/7208922.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f521a13-8ede-4406-bf73-2340c28a7579/62374514069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ed6699-706c-436b-9a0d-90b5541e3f16/nagajigiwilezopurun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea13a89-a1ad-45fa-b1b5-3d6326de1c06/xixufanekijufezejenin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228a770e-fbe3-494c-914c-3798d83639d5/los_rios_de_color_purpura_serie_ver_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f317aa0-a843-4f85-a0d4-843936d9f4bf/panasonic_inverter_microwave_oven_nn-sn965s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0e4397-1dc1-4b62-b3fa-35fd6b8aca36/the_strangest_secret_in_the_world_earl_nightingale.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/chromecast_apps_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152297a7-53b8-4110-a6b2-d94826cd6adb/how_often_to_replace_wahl_clipper_blades.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/51848268996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bb58a98-344f-40e6-bdec-7f485fd9cbc9/marla_maples_news_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e80fd74-1d67-4a51-b8af-6853a736707c/what_are_the_top_3_most_dangerous_dog_breeds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b368ca7-851b-43a1-b114-c9d4342908b4/bob_revolution_pro_duallie_stroller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7919463-b547-4ce3-8b51-4c67ce62b126/angles_worksheets_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a468f37c-875b-4f1a-a26d-89b136d34617/the_lion_and_the_mouse_video_clip.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/66618990967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/798f1ba5-e29b-44eb-8b4f-a198a7a07cf3/55508492202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c2a3fb-aed0-49bf-9d73-a45a87575cf6/candle_making_business_plan_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/85928579468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3df035-a4af-4a50-9c6a-8b1948d9e946/fakitalonig.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_off0000e2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 5236 bytes
SHA-256: 16c0f5c7206b7ebd94b977ccee7b367b13af3cfe6901d3a4f785703b046a3b54
font_01_sfnt_off0000f499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF499 12000 bytes
SHA-256: e3f3d7dc4418e30294869be569ed5db87c86336050f284e92c71d1282dd8ee7d