Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e49561aadaf5935…

MALICIOUS

PDF

78.3 KB Created: 2021-03-27 20:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02a38b1707f1df69c5a93fc7919df09b SHA-1: 50032a1acb5de3519d5dd3000d1b63655b9a62a5 SHA-256: 4e49561aadaf5935461265978ad49e69ac8118ca27d5e71a5cd86ce5de3f8900
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, with one prominent example being https://gimoguvi.ru/wix?keyword=timex+1440+sports+watch+change+battery, suggesting a lure to a malicious site. The PDF's structure and the presence of many links indicate it functions as a link farm, likely to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=timex+1440+sports+watch+change+battery PDF link annotation
    • http://complerbnp.com/blind_man_s_bluff1n5qs.pdfIn PDF document text
    • http://kujedepis.22web.org/what_does_bills_of_exchange_mean.pdfIn PDF document text
    • http://onkoprofi.ru/25267546827pdhu7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_604515a9ed033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_5fd27f7375ee7.pdfIn PDF document text
    • http://robinmani.site/lodulepobegewamosirinakudb6ja7.pdfIn PDF document text
    • http://finansi-7.online/360_performance_appraisal_definitionpakjy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_6041f2496d84a.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/9ae1c7fb-ca92-4d91-9c08-65bae4325654/tascam_dr40_manual.pdfIn PDF document text
    • http://zazidiw.epizy.com/43910021961.pdfIn PDF document text
    • http://savekuf.rf.gd/bunerurolabunadim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d05f55ae-d1c7-4d43-8a64-4328abe7c245/arris_tm822_link_light_blinking_orange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b5319b7-78d0-4b7c-bca0-8727cf95e604/55844556999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187652ac-f6a2-4c6e-bbb2-6efec80912f5/2018_toyota_camry_hybrid_xle_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05c41ec-2a7d-42a4-b504-f1e4448bb6b9/ejemplos_reales_de_estudio_de_factibilidad_economica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7329db02-e667-4d93-b56c-06340b76dc2f/juwudujubadupir.pdfIn PDF document text
    • http://lovofazojoj.rf.gd/gagekikowugetijakufed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65814552-57dd-4d11-b1a4-c7297ffb9659/51501753559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451012a1-3305-49c9-af7c-63a965dfd444/how_do_you_get_an_average_of_an_average.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6dbc8cf-2870-4751-b96c-f2d5cd4c4222/ditigaxineweriju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f1ab50-13ef-45be-adfe-6ccf4fa7ec16/22469114366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4420336-63c3-448a-8702-9f08e983a1fb/lipotezoxosidoxezudek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f734261d-30af-4c9a-a780-6f0f6825d372/the_rosie_project_book_bill_gates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9b85a0-d31e-45c4-83ae-326f0df65edc/why_wont_my_wired_apple_keyboard_work.pdfIn PDF document text
    • http://mesuwirafifi.rf.gd/86184135708.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_off0000f116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 5948 bytes
SHA-256: 56f49ed4d6ef624eaf291932acd27f4bd3cc3862b3a76451ed6fbcfa7c371958
font_01_sfnt_off00010553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10553 11168 bytes
SHA-256: 66fe74f239a5f2596b3cd7abd974e97474777454401dfd3096a9dea363503e43