Malicious PDF — malware analysis report

Static analysis result for SHA-256 389910700c005a1f…

MALICIOUS

PDF

79.9 KB Created: 2021-04-03 01:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 877884b64147c098800697f5b1fb27f5 SHA-1: ee0cb91d3242fdd8a309ab3521f6daa25aa942e3 SHA-256: 389910700c005a1f5d3c38fd7300b0c2bea50b0c7d594c865fc7d4e92b686380
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of a 'download button' heuristic further supports the idea that the document is a lure to trick users into clicking links that could lead to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/123?utm_term=resource+teacher+lesson+plan+template PDF link annotation
    • https://cdn.sqhk.co/ropesuzuruf/ijifgcv/navafijiwuwetedi.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/pgi5B2Z/free_homeschool_online_curriculum.pdfIn PDF document text
    • http://goproonly.com/why_does_my_samsung_s5_keep_shutting_offfz9w7.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/gj9orI8/rizusumib.pdfIn PDF document text
    • https://pexigupor.weebly.com/uploads/1/3/4/9/134901766/tetevejolidun.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/WPkjgii/89504640823.pdfIn PDF document text
    • https://rizaguvaza.weebly.com/uploads/1/3/4/5/134502188/1706162.pdfIn PDF document text
    • https://cdn.sqhk.co/pafitevet/g6vCEoZ/joomla_bootstrap_4_template_free.pdfIn PDF document text
    • http://losinglotterynumbers.com/kivajumabufiwetroj7.pdfIn PDF document text
    • http://crawlmqyu.space/revistas_bordado_punto_cruz_para_descargar_gratisdxel0.pdfIn PDF document text
    • http://meetdouche.xyz/bo2_mod_menu_ps3_download_no_survey_no_offersf3jqp.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://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_a3c8e5dd43b44c0b98aaa35d5bf1d388.pdf?index=trueIn PDF document text
    • http://kotalozobazad.rf.gd/joint_venture_agreement_sample.pdfIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_eee5ab1e12e94f1e8dbad802e41a16b6.pdf?index=trueIn PDF document text
    • http://masusekokuberex.rf.gd/worth_it_1080p_video_song.pdfIn PDF document text
    • https://6c403777-3bdb-430d-a4ca-23d5788374d5.filesusr.com/ugd/e0034b_b5c4c96aa2e94c3fbbe391b5b01c4189.pdf?index=trueIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_214677c188cf40f494a7829290aedb95.pdf?index=trueIn PDF document text
    • https://393102e6-89af-4738-8cad-89662dba8dc5.filesusr.com/ugd/33a16d_6ceda0264a8d4b16a84b5f6b4b1c8290.pdf?index=trueIn PDF document text
    • http://falowowujozaba.rf.gd/how_to_read_the_bible_plan.pdfIn PDF document text
    • http://dimuwebogikufuf.rf.gd/86610563872.pdfIn PDF document text
    • http://bumojomoso.rf.gd/taliwuvozenajenaxomufop.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_7c616c83b1504ba7be1978ba5114509a.pdf?index=trueIn PDF document text
    • https://59b7e61f-9850-45ee-add2-e9646db267e4.filesusr.com/ugd/5b9365_5a2a64df15d24f7dbb9dd1d225b2f327.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_6f917a89472c4174a1d8ba5f2e065a7d.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 5016 bytes
SHA-256: 88b0136aedd2aec839a0408c26502faa44c7dc97bf5b895bbdd5e7055d0ca1e6
font_01_sfnt_off0000fcd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD5 11064 bytes
SHA-256: 39bbe0fd508ef1584052b9134fbc7766d970c4e76329496370db873a9de02652
font_02_sfnt_off00012245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12245 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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