Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6ce937636b2eae…

MALICIOUS

PDF

123.0 KB Created: 2021-04-14 11:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d9ae34af34c4fffc5eb63136a24a707 SHA-1: b98e8b52f22b644cc595a157a3c58638a313d227 SHA-256: 4d6ce937636b2eae6095a3f7a5846eb39f0c004f442fff4f835aa755b5fafe10
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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/strik?utm_term=bible+book+of+james+commentary PDF link annotation
    • https://cdn.sqhk.co/wexunaveb/gj5hcgc/alien_cars_3d_future_racing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/Ejbjgcx/zombie_is_coming_v1._0._unitypackage._com.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/z9gctjf/detective_byomkesh_bakshi_tv_series.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/ifKgjha/zajanubigupid.pdfIn PDF document text
    • https://cdn.sqhk.co/tamireto/dijIohe/21793753196.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/6hcIje4/nyc_traffic_cameras_app.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/de_morbis_artificum_diatriba.pdfIn PDF document text
    • http://kuxemanes.medianewsonline.com/nezepisodita.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/drLhb3H/nulunasowaviwinekeku.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/pisadegef.pdfIn PDF document text
    • http://dexiserabasavo.mygamesonline.org/12877738102.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/fujadabez/microsoft_word_wikipedia_template.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/18886000523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b60d22a9-dac8-4ddc-8cb9-80f22e051b86/kauai_real_property_tax_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/97422871286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a150ff5-d5ee-4008-af12-c30bcb86766a/how_do_i_use_my_canon_camera_as_a_webcam_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/running_schedule_for_beginners_to_lose_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/becoming_supernatural_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/67100640162.pdfIn PDF document text
    • http://litorow.myartsonline.com/numakuvenipufazenonune.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/free_html_book_store_template.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_off00018e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E78 5244 bytes
SHA-256: 46359b3bc03bc182c2d950108ba3477e5901283412a1e2822511a43e7aa2136d
font_01_sfnt_off0001a03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A03F 15592 bytes
SHA-256: 2099fa2ab08746d67adc77c9222c3830f28ff07a8af90686e5390de5d3078f89
font_02_sfnt_off0001d025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D025 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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