Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd234e24039df801…

MALICIOUS

PDF

83.1 KB Created: 2021-03-25 10:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5f0fff0f13ed6a878b45858e1148b9e3 SHA-1: 37e0840f47369510d51afb6cb6f0d9e81a91df77 SHA-256: dd234e24039df8017886e74dd0322d99a7a8d04706a87c918032ebf056455356
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 0.9990

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://druttle.ru/award?keyword=tutorial+corel+draw+x5+desain+kaos+pdf PDF link annotation
    • http://copytoshka.ru/minecraft_transformer_mod49cg7.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/systems_engineering_jobs_nyc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478127/normal_602eda193bb8c.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/in_ground_basketball_hoop_installation_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_600cf70129a1c.pdfIn PDF document text
    • http://copyrightsupport-ig.com/66741813369ivf2n.pdfIn PDF document text
    • http://devgm.design/lidirotajigafazaxazifekuwfw1i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496381/normal_5fcf09207f306.pdfIn PDF document text
    • http://cucoupon.info/35492208424nmild.pdfIn PDF document text
    • http://afterdealer.pro/youtube_labrant_fam_tik_tokqjwag.pdfIn PDF document text
    • http://chunyoo.com/launcher_for_terraria_androide0jir.pdfIn PDF document text
    • http://bnl-jobs.com/9897827027yi8vf.pdfIn PDF document text
    • http://prizinsta365.site/how_to_service_an_elliptical_machineei1t4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392877/normal_5ff31eae69e56.pdfIn PDF document text
    • http://damvglaz1.xyz/9049982043176l2j.pdfIn PDF document text
    • http://mugedly.xyz/will_covid_19_be_over_in_2021mm5b6.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/meludav/hp_1536dnf_toner_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/beetlejuice_google_drive.pdfIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_6d1cfc3679e8490589b5cd9ddd5ac764.pdf?index=trueIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_ba61269c0c6b428581b40ead5cc2f925.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/74996281520.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/gobafemedajojerapopizowus.pdfIn PDF document text
    • http://lelikerakovet.atwebpages.com/96834695955.pdfIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_cdac0f74493941f08447e107dd31e63c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/98007991536.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_off0000f87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87D 5328 bytes
SHA-256: edecb7ff2c1fb244547bbbcecd5b3af22f43ef344e1eb2264cb07826f70a0d47
font_01_sfnt_off00010ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC2 11148 bytes
SHA-256: fd54782e666f3c1856563ac7a26bc3d8aee5b3015210f778bebcb42236880046
font_02_sfnt_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361