Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fb6a9295e70f51…

MALICIOUS

PDF

82.9 KB Created: 2021-03-10 01:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 52289b23968a84546e48262e4a3b785a SHA-1: 2dd200e4c1ddb06d9b06404f30b200921da651d0 SHA-256: d1fb6a9295e70f51837e8a73441df6e71f8cf49967fc41f4f994dc4c0b3c3739
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or scam attempt. No scripts were extracted, but the presence of external URIs and the overall structure strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/aws?utm_term=what+is+a+normal+2+year+old+behavior PDF link annotation
    • http://ital-girl.space/lcp_2_partse4z6e.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/ggkjfgi/99245661064.pdfIn PDF document text
    • http://mklhhhh.space/buremagobudiz5eyop.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/ZCzifij/drop_kick_soccer_ball.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/GiaFghd/zibarajadorapuvut.pdfIn PDF document text
    • http://xtina.online/bcs_preparation_routinep1k2p.pdfIn PDF document text
    • http://hq-cleartv.info/honda_lawn_mower_shop_manualjqgi1.pdfIn PDF document text
    • http://globalsafegroup.com/39062989021v9g0f.pdfIn PDF document text
    • http://vitrinachel.ru/london_bridge_full_hd_wallpaper0zqwg.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/bjbjhhf/my_little_princess_spa.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/ghidDgd/parler_meaning_app.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/download_new_frp_bypass_apk_20200go46.pdfIn PDF document text
    • http://ihsteam.ru/tolokesilaludj6b69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sitozi/79398041950.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_5aa0a592a61e4c6ca1a88a334b7f9868.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b983ae12-8964-4c0e-b9e1-499b303ead59/jozeli.pdfIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_2787e44af9eb4d86b6430ecf80868375.pdf?index=trueIn PDF document text
    • https://b23183eb-b2e5-455e-bc25-91fac1efd10f.filesusr.com/ugd/cc14e4_6cc660789b614f67a780de9ad168bba6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/85154395229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6989e8f-28f0-4eff-96f9-b809e19816e7/webiforelodefifotametuto.pdfIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_fe32b0ca017b4a43b04f4de51691c0bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/defipedibe/artisan_roaster_scope_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/181e0c3d-1279-4064-8228-0ae490c3cf5c/does_vizio_e_series_have_screen_mirroring.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/finance_challenge_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 5300 bytes
SHA-256: 0eb1550a38332ea4dc869bcb5005ac3b6d1ab5e8d66cd9d333bf4e3015b4e1dd
font_01_sfnt_off00010cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC1 10324 bytes
SHA-256: 48bd2ff6f4a22a82a1ba45fac0c177f43d07b916298b3290979a82cbd38d4927
font_02_sfnt_off00012feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2