Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8f6deb517e30f2…

MALICIOUS

PDF

71.7 KB Created: 2021-03-27 12:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 974b576dd2ef620b8c49a8235dabff64 SHA-1: 9f25ea7629421d4662ddfec73b3919c848381606 SHA-256: 7b8f6deb517e30f23e3d26100d1ba7fe734237e92fcd2b66ca8083c71e8d7b6f
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 0.9998

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
  • 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://soxebez.ru/award?keyword=color+blind+test+pdf PDF link annotation
    • https://gakujoxabusu.weebly.com/uploads/1/3/5/3/135394689/fimarikoser.pdfIn PDF document text
    • https://vipoferizapil.weebly.com/uploads/1/3/5/3/135346342/dazoketodoxizon-safetudadof.pdfIn PDF document text
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/5316423.pdfIn PDF document text
    • https://luxabilep.weebly.com/uploads/1/3/0/8/130873941/tafaluzetojewu.pdfIn PDF document text
    • https://jivenikovo.weebly.com/uploads/1/3/4/3/134308789/bejedip.pdfIn PDF document text
    • https://pisixaxonazav.weebly.com/uploads/1/3/5/3/135394173/nakorerun-mevowosozufedo-pegiboxidewo.pdfIn PDF document text
    • https://guvusogom.weebly.com/uploads/1/3/5/3/135324715/zadibaj_nimuxosamej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/79518434815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764abd9a-72e7-4db8-918b-fb98062208ca/honeywell_th8000_thermostat_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/78157758632.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/nagekagupabezogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0e4162-3cf5-47a2-91c1-4a12a17e4e39/el_mundo_de_sofia_resea_critica.pdfIn PDF document text
    • http://fofomekurun.rf.gd/cengage_chemistry_for_jee.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/23812710708.pdfIn PDF document text
    • http://xadaxaxug.epizy.com/charlie_malayalam_movie_song_starmusiq.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/zupemok.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_df960bfdd2ef4c3fa9a4c73b5af50929.pdf?index=trueIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_f71757ee6b444512aa27cab6c64aab12.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF5 4872 bytes
SHA-256: e938379b0393c884225fc28730e09eee2cc206079cb47587d3b289c20a5316a5
font_01_sfnt_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 11408 bytes
SHA-256: 7b8d7a7f410df9dddd4f0277964d4fdbc95b01f4b8c9bbb7e5a222bea5f7047f

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