Malicious PDF — malware analysis report

Static analysis result for SHA-256 210baa9ef24bc256…

MALICIOUS

PDF

106.3 KB Created: 2021-04-06 08:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 83026a26f475b3617057baf5934e97de SHA-1: 51828b9528fe16002862958b0bbca8024e0b822e SHA-256: 210baa9ef24bc2560d4772a1f9d48c903a6be3cff0c0c61ff3decf4c0ff378e7
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous external URIs, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of embedded URLs and the heuristic identifying it as a link farm on disposable hosting further support this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://bologen.ru/award?keyword=melodic+dictation+examples+pdf PDF link annotation
    • https://cdn.sqhk.co/mofipife/sZjeih2/nuwisekidatinegekidinela.pdfIn PDF document text
    • http://daimontimur.org/30652351632dihwr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_60008890d5bb9.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/82960941965.pdfIn PDF document text
    • http://uscarinsurance.info/63671137931bybyz.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/ahf7Cvv/59918612059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_60384920cefda.pdfIn PDF document text
    • http://moneymaya.site/how_to_connect_pioneer_mixtraxdmpbx.pdfIn PDF document text
    • http://stopnutristrike.ru/black_hawk_down_game_xboxuvkbc.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/hFF2Ojf/8807249641.pdfIn PDF document text
    • http://didibemez.scienceontheweb.net/russian_language_basic_words.pdfIn PDF document text
    • http://rafupufubed.mypressonline.com/nuevo_diccionario_biblico_ediciones_certeza.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxonavi/xhdgg1T/24627207799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/brachial_plexus_presentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22affa04-a033-4d07-88e4-eb4255afbcfe/70669220221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b55b69a-4468-4f65-bfa6-c7ae4e02a9ec/84598056525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86759828-f7ba-451a-b4cb-d9ac3f42e8de/kenmore_refrigerator_coldspot_106_ice_maker_not_working.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/basketball_court_measurement_in_meters.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/21391969285.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_off00015f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F74 5276 bytes
SHA-256: b2c8da4196df8a506854d163b1adbcbb110c9a92dc1d32bf5f5f15e1ea962372
font_01_sfnt_off0001716c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1716C 13276 bytes
SHA-256: 8a52d8cdfa1941d989386a491635fe0e6b851d40f4c8a50364423caa7a5910c4

Open this report in the interactive analyzer, or submit your own file for analysis.