Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b1d0b6ef73e1d3…

MALICIOUS

PDF

76.5 KB Created: 2021-03-07 18:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 13ad09bed6e7675ad736c80bd3cd9d44 SHA-1: 8a107b9113f7ce65faee1b5644a4cc5b4311dcd3 SHA-256: d0b1d0b6ef73e1d3f292106270ce8b0236d591d9c8f3683ef0dbbdcb72483078
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains keywords related to job searches, which is a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://jacksth.ru/award?keyword=marketing+manager+salary+san+jose PDF link annotation
    • http://tehnotop.space/jokipamekezxzfqr.pdfIn PDF document text
    • http://aazzzry.space/womuxokr607.pdfIn PDF document text
    • http://goodik.fun/adobe_acrobat_dc_crackiugcv.pdfIn PDF document text
    • http://fastgetme.online/400901138316221x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427097/normal_5fc683c2f3d94.pdfIn PDF document text
    • http://jagefefixod.22web.org/singular_and_plural_nouns_worksheets_first_grade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5fedd48547f46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a295512-8a6b-42aa-86ab-0010a50f678f/do_you_put_comma_before_or_after_parentheses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0127a029-42c5-456b-aff0-bfa1eec05c91/how_do_i_reset_the_code_to_my_sentry_safe.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_fad845b65f5e4ed0be5f40401ca4ddd8.pdf?index=trueIn PDF document text
    • http://vipebajivakal.epizy.com/cisco_sg350_spec_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bff99ee-e4f8-48af-80bc-cd6889ccccf7/are_doritos_locos_tacos_bad_for_you.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_2d1648a856294874aa61fe3299d3ad87.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3379b225-c5c0-4dba-a29a-c80eda387990/is_kindergarten_mandatory_in_ga.pdfIn PDF document text
    • http://rajakusotiluzo.rf.gd/blood_vessels_structure_and_function.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_a3ce984ee9044a609736a38a1651694b.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_4d7d2f829ced4b188017a5c700fb16bd.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_b603e0b0ad084958bcf3600f88150721.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d75c8d-6f85-44d1-870f-40b5539782f2/top_quotes_from_thousand_splendid_suns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62cdac0b-3cec-419f-adab-3410bfce30a8/activate_windows_10_pro_product_key_free_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b56043-57e9-4a09-9a8c-98a3116c5e32/garmin_vivofit_jr_bands_officeworks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17b2cd46-620f-4ee0-97b5-e90457593ffb/tonivotakevanujuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1960a6e3-69cd-4226-a618-f1d8779bd488/57860586646.pdfIn PDF document text
    • http://milibelibagusez.epizy.com/tuwetepasutevusepitekizez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06fa1934-ca99-42ec-a65c-4508bd520372/70029586491.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDD 5252 bytes
SHA-256: 5ada9a78197a6dffff06887cbe03c4f5bd3fdc13b08a2d73e4c0aa04da338fdc
font_01_sfnt_off0000ffc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC0 10704 bytes
SHA-256: f6f9bab006a3ee1c2d1ba4765a7893b267a029b16934fed814cd93ce3cafd486