Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad86c8c42249ebc1…

MALICIOUS

PDF

84.4 KB Created: 2021-03-24 17:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fadac5ef0400f80f43b311f10f300c2b SHA-1: df5c60245bcf76206378248125fca213ca3de544 SHA-256: ad86c8c42249ebc13b1f5ac0897d187c0418c918e7e6d9df4caf28404154bf8b
186 Risk Score

Malware Insights

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

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 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/123?utm_term=pubg+report+cheaters+xbox PDF link annotation
    • https://jodejivosarixu.weebly.com/uploads/1/3/4/3/134314211/d892bbd.pdfIn PDF document text
    • http://rarebuzoxexovom.22web.org/xilubanovaketuvivasejirig.pdfIn PDF document text
    • https://baduninenivogov.weebly.com/uploads/1/3/4/5/134589003/9113947.pdfIn PDF document text
    • https://tozisodije.weebly.com/uploads/1/3/4/4/134486105/42c2b798493e.pdfIn PDF document text
    • http://nigasheff.xyz/funorelenre23.pdfIn PDF document text
    • http://hookup154.online/37095426589beyu4.pdfIn PDF document text
    • http://picsonair.com/ximazataxewuporuxubusolok44k.pdfIn PDF document text
    • https://wixivowid.weebly.com/uploads/1/3/4/6/134689466/5650762.pdfIn PDF document text
    • http://mailedflkf.site/vorujagiruravewozuxljia8.pdfIn PDF document text
    • https://lulodepi.weebly.com/uploads/1/3/0/7/130776712/3670942.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/32e9bd2e-870e-405a-a77d-2feba39e398a/rijijovidesuwotoj.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_957f8802fbcc45d0a2052bb35a04814d.pdf?index=trueIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_ada21227245f4219a1a8d0f5286783e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c51fca6-fe73-495f-b8d4-f7a1a2582e6c/mubuwisokulinureta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58518bd7-9775-4275-8f2f-186ef524ba9b/how_to_hook_up_malibu_low_voltage_lights.pdfIn PDF document text
    • http://pazovegisot.epizy.com/how_do_i_fix_error_code_f02.pdfIn PDF document text
    • http://menotuzuv.epizy.com/31590757473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aed5cc17-f897-43ce-8341-27b01bed2f82/how_to_pair_jvc_bluetooth_kd-bt11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83815fc9-06a9-42e6-a9c3-7bedd12b5065/kung_fu_panda_2_watch_movie.pdfIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_dbae013aaf54422587ec5ae548a90905.pdf?index=trueIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_8393ba38602946d6b1f373282ce75812.pdf?index=trueIn PDF document text
    • http://dubixifixi.epizy.com/98454985158.pdfIn PDF document text
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_2a46f9fdfa19458e8ed56253299ea3b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef2856e-3266-42c2-ac16-732a53c9621f/56343726871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d883a737-9f87-45a7-aee5-0c9d64b27fbb/77826725443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c33e6b-01dc-446f-98ab-7b64efe9b8d5/keurig_2.0_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323c1d9b-6798-4432-9153-d7c6bc359a8f/garmin_nuvicam_lmt-d_6_gps_sat_nav_-_full_europe_-_built-in_dash_cam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43E 5372 bytes
SHA-256: 803c7817358019d3a46d864b20ab7b5917270526dbbc91d336fc7258eb5c1177
font_01_sfnt_off00010684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 11080 bytes
SHA-256: f808181cb13d4c850f82335d26f7e072883f4a3c1c0f7cd9e57db7f94bc2e5b5
font_02_sfnt_off00012cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC6 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501