Malicious PDF — malware analysis report

Static analysis result for SHA-256 0200a3f09f58a2f9…

MALICIOUS

PDF

87.2 KB Created: 2021-05-07 02:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 788c6ffd2dc3f69fa50f9f64695df03b SHA-1: fdb49ae9d2db39dfdad6ee373d362bec2b0a40a0 SHA-256: 0200a3f09f58a2f959fac31cb294489d8bc2194026a81aa39de600eb3d4c26f0
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain text related to a Rubik's cube, likely a lure to disguise the malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+is+the+algorithm+for+a+3x3+rubik%2527s+cube In PDF document text
    • http://sogixusi.medianewsonline.com/lg_top_load_washer_ratings.pdfIn PDF document text
    • http://gozatelaji.22web.org/idaho_fish_and_game_tag_reporting.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/21162064407.pdfIn PDF document text
    • http://bezerojiw.scienceontheweb.net/nawupamujerekopod.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/winning_the_losers_game_6th_edition.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/jambox_jawbone_speaker_review.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/polaroid_sx70_film_vs_600.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/f1e0e678-94c9-48d6-8488-be5846fd9cf7/kubla_khan_poem_critical_appreciation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b91592d-87f5-48c8-82ca-544382f410ea/hallelujah_chorus_from_the_messiah_by_g.f._handel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fc2c7c-c4ba-4871-ac4f-dc25da95b6fb/how_to_get_rich_from_forex_trading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd3472e-ae41-45d0-9e7c-9b26947473ad/how_to_change_combination_on_kaba_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78b20ec-5399-4b49-a7cd-4df6ac3b654f/can_a_landlord_prohibit_guests_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/432b2354-e2a3-46b8-a9c3-239eb32d3683/41160552432.pdfIn PDF document text
    • http://folezazav.epizy.com/vidmate_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc6edcfb-f5db-4454-a095-6dab2d2f5f14/rt-ac68u_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18a34bb-42e2-4829-93e9-59d747ebfd99/fopilumonudugixadanet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8bf1c5-fb19-4e9b-a24a-5bc3ae6edf73/95971534930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2dbee25-e91c-44d6-b2df-4cf6fa2d0bca/89433071899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84fa1786-7b20-4ea8-8977-2fbba771feb2/the_boy_who_harnessed_the_wind_story_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39567f0a-5bd8-4b5d-850f-c442562b515d/junie_b_jones_reading_level_age.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7562ef7-722d-4317-9f6f-b4f00e1fd84a/how_much_do_traffic_cops_get_paid_uk.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_off00011233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11233 5780 bytes
SHA-256: 55d46630aa3b109f2247e6df69e00aeb1378b8f34bbd68c311a8b97ebfd483ca
font_01_sfnt_off000125cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CD 11764 bytes
SHA-256: e5b32830964076e576a070d370fe93ffc4384fb31bf386ece9ce1b76cd090b6b