Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fed0e1c5bebc2e…

MALICIOUS

PDF

79.7 KB Created: 2021-04-07 17:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d3ae01f40ad5eeb44a7801428015c0c7 SHA-1: 119a9e0c1d55673f45df2853bfd76ad23e1f219e SHA-256: c6fed0e1c5bebc2efe63cb91d5f438e108839880c6199406af49dd6b3fa71f6d
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. 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 7

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://seumenha.ru/strik?utm_term=propresenter+remote+not+working PDF link annotation
    • https://cdn.sqhk.co/rewaloxuruvu/Lhahghc/87135194288.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/8lN6EGJ/keroxemuvutibunex.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/Rjg5zm8/79330667262.pdfIn PDF document text
    • http://specrazreshenie.com/802749355867t4s7.pdfIn PDF document text
    • http://wrestling-mma.com/how_to_connect_yamaha_rx-v385cj73m.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/hjNNhb8/78555080147.pdfIn PDF document text
    • http://tuimag.ru/17739962455nngzv.pdfIn PDF document text
    • https://cdn.sqhk.co/ludafojebi/RFBHQQM/56814177945.pdfIn PDF document text
    • https://cdn.sqhk.co/nijodujex/thixgdU/tozejilutepifejovet.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/O0ierjj/what_s_the_picture_guess_pics_answers.pdfIn PDF document text
    • http://trynon.xyz/chameleon_launcher_pro_apkfium4.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/g5Nibfw/highway_to_hell_guitar_tab_songsterr.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/c28bcb5b-f0b0-4964-aa07-1444708c8bd3/economic_loss_rule_california_special_relationship_exception.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_cb04e5eb0022476db3c2643a69e40d4e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30f02e8-2771-4ab0-bb9f-886df2f74055/wolidefagusevunumuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f79a237-7d9d-42b6-9f50-a3ddfd9c2f0a/whirlpool_duet_steam_dryer_error_code_f70.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_9260a659f9404220a913f7c3c118d031.pdf?index=trueIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_4098e0293c0940bda90d73e64a6d999e.pdf?index=trueIn PDF document text
    • https://3557a179-a1ee-4801-a209-85ad6f504536.filesusr.com/ugd/9c409a_40f91434f4a744d4a4a192ffef527cf0.pdf?index=trueIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_20a8b4c409ee4b709efa79cff8e8ba70.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_off0000faa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA7 5052 bytes
SHA-256: f1f169d4ebeb0aaee420d18d613dbf156a38de034d065143a351c799c2261346
font_01_sfnt_off00010bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDE 11068 bytes
SHA-256: 7004afab3f7ab12cbc3c39b9ba15ee537e9333a2a31b02bb74679f949ec39514

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