Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e743d70f4344e78…

MALICIOUS

PDF

75.2 KB Created: 2021-03-09 04:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1adcc7eb1e6ebe5e50adcb408639ac3 SHA-1: 91fa9721f5f766091eb92c5b2f9d95a2e9b6a45f SHA-256: 8e743d70f4344e789122b24ff9344911cefe232bac03f48d7f027c6248aba9f2
126 Risk Score

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 0.9994

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://pelibifir.ru/123?utm_term=babhana+mage+chuma++dj PDF link annotation
    • http://axecheat6.xyz/22644449289jy1qw.pdfIn PDF document text
    • http://soul-felt.com/how_to_check_covid_19_result_in_saudi_arabiaggbjl.pdfIn PDF document text
    • https://reluxepeguru.weebly.com/uploads/1/3/4/3/134363030/3946619.pdfIn PDF document text
    • http://ig-copyrightnotice.com/xonekamavijiwilucpkym.pdfIn PDF document text
    • http://topdiscount.pro/serirelajonopaganukivkhii2.pdfIn PDF document text
    • http://afracheat8.xyz/timecutter_ss5000_parts_diagramjj9xt.pdfIn PDF document text
    • http://sellforce.ru/lenuwitonikuxabixunraqf1.pdfIn PDF document text
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/vemikejeg-junapune-sameripugo.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/how_to_change_paragraph_in_excel_macdu307.pdfIn PDF document text
    • http://xuxikanewojolaj.22web.org/gibuzirugopivoretiliser.pdfIn PDF document text
    • http://fapseo.ru/monster_vs_aliens_movie_free_downloadppehc.pdfIn PDF document text
    • http://motivawka.online/fukutadipukamudobigegabimef1s.pdfIn PDF document text
    • http://vertigoa.online/good_video_cutter_androidxzns5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://rovututuxopi.epizy.com/nafiwifapiwuziru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6ef4d44-5e00-41af-9a3a-4e424d05d92a/is_the_whirlpool_cabrio_washer_good.pdfIn PDF document text
    • https://7ed1f289-57d1-4e2a-9ee4-b64e0eb498cf.filesusr.com/ugd/13dc0c_a42574288f654f62843b8da7f7cc698e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38fdc917-de4e-4a1b-9be8-04d41593d60b/56777493432.pdfIn PDF document text
    • http://gagisejokunego.rf.gd/juegos_de_hombre_araa_online_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e72c81b-e9d6-48ec-a5fc-79c6f3606e23/mofupixatetabiv.pdfIn PDF document text
    • http://jaxejibowanub.rf.gd/12508633513.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_01916f3315d845ada25a86bfc5a573df.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_5cfc54b1d1164ccda30822038ed07eb7.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD4 5312 bytes
SHA-256: fb7bb50c018b5a40cda91071a92151ef683a3181715fcf9911f6e0420008f401
font_01_sfnt_off0000ddc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC0 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000e923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 10696 bytes
SHA-256: 842667dbe0dc147bdd35f8071eeb9421a3659cdaa2dfdc1821ff8fb15a6716f9
font_03_sfnt_off00010d92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D92 4068 bytes
SHA-256: bd2bea31b95312bf8030674a6c74b8a7670c9c27fd3adb254a439ff9c030004f