Malicious PDF — malware analysis report

Static analysis result for SHA-256 799e17d37ca60bcc…

MALICIOUS

PDF

80.7 KB Created: 2021-03-18 02:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bfa177b82fd7d9354a2e1bfece899c46 SHA-1: 7a6ed78b900d699d8994495df75f67561decd8e9 SHA-256: 799e17d37ca60bcc59e7ffd8057b474247801bd78907169f11cf5693e60c9714
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous external URIs pointing to various domains. The PDF contains embedded URLs, suggesting it is used to redirect users to potentially harmful websites, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=observer+minecraft+recipe+1.14.4 PDF link annotation
    • https://cdn.sqhk.co/vasegodesazu/chdm6nh/6213935236.pdfIn PDF document text
    • https://cdn.sqhk.co/finelega/jieyjhH/imfdb_john_wick_2.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/iaCjhgd/49968551447.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/cja4pic/free_christmas_picture_bingo_card_generator.pdfIn PDF document text
    • http://kijorifoweb.22web.org/camera_scanner_premium_apk.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/47033240675.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/kiran_publication_bank_clerk_books_free_download.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/authors_purpose_lesson_6th_grade.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/NKhbhxC/spiral_ham_store_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/jjbifji/27104943216.pdfIn PDF document text
    • https://cdn.sqhk.co/lisakopew/f85hchi/5281907478.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvarelo/98958711128.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/5381919350.pdfIn PDF document text
    • http://sozidimimu.rf.gd/rasufa.pdfIn PDF document text
    • http://xufolat.atwebpages.com/52036476610.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/full_form_of_abbreviations.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/manual_de_auditoria_ambiental_la_rovere.pdfIn PDF document text
    • http://tuxijug.rf.gd/rojakorodusa.pdfIn PDF document text
    • http://muwalolerede.epizy.com/zananimafuferakowan.pdfIn PDF document text
    • http://gogamezotuzapop.epizy.com/war_plane_games_for_pc_free.pdfIn PDF document text
    • http://wegewid.epizy.com/media_and_cultural_studies_keyworks.pdfIn PDF document text
    • http://nekonopevijaj.rf.gd/mr._coffee_easy_measure_12-cup_programmable_coffee_maker_black_instructions.pdfIn PDF document text
    • http://kenuzuwemonuda.epizy.com/land_reform_in_the_philippines_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/44925961086.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_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 5528 bytes
SHA-256: c3d9b0d59b186f9e67f88307d456651be8579941db02cdea14dcc0113a3bdb63
font_01_sfnt_off00010e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4B 11360 bytes
SHA-256: 50620faaa7f0909f263e44d972c85d982db900a86212b6fb00b184a4e8191827