Malicious PDF — malware analysis report

Static analysis result for SHA-256 95d1de00f032c8cb…

MALICIOUS

PDF

82.9 KB Created: 2021-03-24 04:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bbe9062e87b906742b235c190aa7baf7 SHA-1: 7278bdd6a4871e3c212a651f9fd4e58a9010176e SHA-256: 95d1de00f032c8cbcac6194c6f3df72d0122438635d425d7067965c0b515ab78
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=tbi+waiver+manual PDF link annotation
    • http://giwitijudaleka.mygamesonline.org/mokawiwazeferaw.pdfIn PDF document text
    • http://mapitunokon.22web.org/encyclopedia_of_chart_patterns_second_edition.pdfIn PDF document text
    • http://babitilakibo.mywebcommunity.org/skyjack_3219_battery_charger_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/mivuxakadu/ylWjdw0/nojineniten.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/cztEldp/tiny_house_build_cost_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/hc2hjrg/photo_editor_for_pc_free_download_filehippo.pdfIn PDF document text
    • http://wozuxel.getenjoyment.net/fefakadu.pdfIn PDF document text
    • https://cdn.sqhk.co/polirorenu/jjzCiiI/agora_video_call_react_native.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/bIiaVve/98554288856.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/eqpUhbT/vr_mathura_food_paradise.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/cCgdyib/24853148502.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/hhXjdhh/free_2nd_grade_first_day_of_school_activities.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/jarjhhi/download_cyber_hunter_android_apk_obb.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
    • http://giratas.epizy.com/maplestory_free_full_version_for_pc.pdfIn PDF document text
    • http://mavusovemoritev.rf.gd/chm_file_reader_android.pdfIn PDF document text
    • https://eb7ae0bc-69c2-4833-8adb-ed465737bb77.filesusr.com/ugd/23493e_6c074973a66040e6b5a9d1e3b1f06417.pdf?index=trueIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_0fdc75571ba44303b91ce98b6a443724.pdf?index=trueIn PDF document text
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_df6180e482cd41b3aa47880a1b335298.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 4588 bytes
SHA-256: 120b576ca1f17b94a0b5fb86a9da2e4cd59afb0164abe73ba139b4aaf171f3c1
font_01_sfnt_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 11188 bytes
SHA-256: 6133af63e693df2e162692d628b264818f703c22b6d40497ece881925471c955
font_02_sfnt_off00011ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD7 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00013005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13005 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361