Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47bada792524bde…

MALICIOUS

PDF

71.8 KB Created: 2021-03-10 22:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b2e8f5e588123b4871c06170179c5c54 SHA-1: 27af1b5d3a4472a9b672b235a80499a60703ae8e SHA-256: d47bada792524bde5d01fb80408f2c7b13792b8b9c36a26c14d42ce196050c62
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

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://zajinet.ru/wix?keyword=rate+of+reaction+pogil+answers+extension+questions PDF link annotation
    • https://cdn.sqhk.co/xizefonuma/jhjhMvr/talibolelagi.pdfIn PDF document text
    • https://cdn.sqhk.co/gogefaman/K8XgdVI/wedding_cake_cooking_decorations_edible.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/plataforma_acadmica_academusoft_ut.pdfIn PDF document text
    • https://cdn.sqhk.co/wanaxowuwot/hbgfih1/super_hexagon_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/giHjdpx/air_traffic_controller_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/rurufimibiwe/BajaGhh/messenger_app_for_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/J6hcARD/backyard_pilot_apk.pdfIn PDF document text
    • http://lewabuvuk.22web.org/41833460052.pdfIn PDF document text
    • http://kilijosizujowo.medianewsonline.com/download_film_divergent_2014_sub_indo_360p.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/hcgeje7/58021067735.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/ijenNif/kuruvuxurok.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/tubawosixu.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/hiTQife/mirin_vs_rice_wine_vinegar.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/4Yel1VS/black_raspberry_jam_without_pectin.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/69777016-7439-4ac0-9393-d40192907b41/events_that_led_to_the_renaissance_in_italy.pdfIn PDF document text
    • http://nixutemexeteted.rf.gd/judith_butler_gender_trouble_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e62798-a5b1-4abc-8d9b-bd479b1a3e24/27483788284.pdfIn PDF document text
    • http://rogoxeruf.rf.gd/48819437961.pdfIn PDF document text
    • http://mufozugiro.rf.gd/8847053395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a521160-1c87-4c43-8e7e-85958f6ed79a/gulevelibik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2390876-3789-48ab-8a18-2df2200b4913/lost_islamic_history_firas_alkhateeb.pdfIn PDF document text
    • http://vemireme.epizy.com/kudodaboren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/975b65e6-3ce0-4f7d-8d7b-fae56d33881d/how_to_pair_nakamichi_bluetooth_speaker.pdfIn PDF document text
    • http://dibulokesimerog.rf.gd/13303094893.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/bash_script_variable_scope_function.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_off0000da09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA09 5476 bytes
SHA-256: a8ffe475d4689bdba9d6cf6c86dcceab1ba754c8fde41b720404cce443a224ce
font_01_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 10736 bytes
SHA-256: f4aa4fdcec08f6ca78061c020fb510b3324d8dac15303689b7553fed66edcea6