Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bf4b1afe26b2aa…

MALICIOUS

PDF

79.0 KB Created: 2021-04-05 20:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 68ef5c18828e8e921233851a28c3ab93 SHA-1: 931667921f0b18c8fdbe4edf99fea8c70b8cc762 SHA-256: d5bf4b1afe26b2aac77e8c8dec4e8f12a8cc2a4cf58ee1edb7fa20cac363caf8
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=million+dollar+habits+summary In PDF document text
    • http://hookup671.site/nimovoritolafuvasibaw5smi.pdfIn PDF document text
    • http://indir-kazan.com/riditoluranfyfqt.pdfIn PDF document text
    • http://gedagefi.22web.org/rufonafobe.pdfIn PDF document text
    • http://mivetys.xyz/80406742588tpx7v.pdfIn PDF document text
    • http://motopepawoti.iblogger.org/lodimibena.pdfIn PDF document text
    • http://keysecret.ru/i_robot_book_plot_summaryo4idb.pdfIn PDF document text
    • http://kamaz-ftc.com/xefusugufof2k58j.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://uploads.strikinglycdn.com/files/2afa72e1-0b11-4541-bd03-7855f51d88a9/alfreds_piano_101_book_1_free.pdfIn PDF document text
    • http://likumukifaxokoz.rf.gd/rabig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438d286d-a5d8-4553-b7ec-8f7caf888377/88247786609.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/indian_air_force_formed.pdfIn PDF document text
    • http://lokeliniju.epizy.com/18813900563.pdfIn PDF document text
    • http://sinomol.epizy.com/3968446070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98949790-c0b5-471d-97b3-01e651f3e98b/how_to_fix_a_mic_that_wont_let_you_talk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f89502-c3b1-48d5-b05c-eb43fd479b09/deep_pillow_thoughts_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b73935-aa61-44ec-99ee-06dc5abf7569/the_maze_runner_4_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/paditidelaleroto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb38973-b70e-45a7-88db-0de186e694c0/xojod.pdfIn PDF document text
    • http://tunozesanapi.rf.gd/86940511868.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/88465667890.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_off0000e8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 5076 bytes
SHA-256: ad71141df5ede1ff7c19b17c9f92db22c0f35ce60785616d215481b6128c7e6b
font_01_sfnt_off0000f9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C9 10976 bytes
SHA-256: 14400b1bfec825b3a32c194a6ba895d184affe357735234f69d7f9fe825a5a25
font_02_sfnt_off00011f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F30 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.