Malicious PDF — malware analysis report

Static analysis result for SHA-256 48559046975a1682…

MALICIOUS

PDF

87.5 KB Created: 2021-03-07 18:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e1e7337abaede80bc5cbcba6e484cbfc SHA-1: f7a8e31cc1f9a67b1c6e3103b628db1aea6d415a SHA-256: 48559046975a1682405c3d82d8054b19e20e2651a99bcc82016ce7e963ecdff1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the overall structure suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=an+imperial+affliction+book+pdf PDF link annotation
    • http://petersikdar.com/oxford_english_book_for_class_2_free_downloadb4y9i.pdfIn PDF document text
    • http://reetodo.online/masse_fs_17n3453.pdfIn PDF document text
    • http://dmdmassage.com/dipawosebizejudixedeyzpdl.pdfIn PDF document text
    • http://raisinshub.club/87165869156lrfnr.pdfIn PDF document text
    • https://cdn.sqhk.co/lasesekov/LNiiGja/my_talking_angela_game_online_play_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/4qjgjox/stick_cricket_super_league_match_fee_description.pdfIn PDF document text
    • https://cdn.sqhk.co/ninituraxasu/Xijjdgj/moxomunuzidewivemuki.pdfIn PDF document text
    • http://zupedaganivo.66ghz.com/xebujutanudubipadubuwuju.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/h1eicpT/95514156901.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/CYGjfgh/repexasopuxamozejepo.pdfIn PDF document text
    • http://ritual-venki.online/abcmouse_app_revieweb21t.pdfIn PDF document text
    • https://wubudonujekud.weebly.com/uploads/1/3/4/5/134524452/vepopuso.pdfIn PDF document text
    • https://posapana.weebly.com/uploads/1/3/1/4/131454172/zakawikimax_sobosarutuli_kugoxasupukifof_fomofevol.pdfIn PDF document text
    • http://tenakororor.iblogger.org/how_to_use_the_bissell_proheat_2x_carpet_cleaner.pdfIn PDF document text
    • http://tuvuvadirozo.iblogger.org/gamma_broodmother_guide.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/pegebunov/pelopusawibeze.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/56279242228.pdfIn PDF document text
    • https://9e705916-5bde-4eb8-be9b-8b3e910fbaf8.filesusr.com/ugd/c7a620_977f04b98b784223bf58cfd23be57e09.pdf?index=trueIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_81ecace4d43b47d6942ca0f6b2466df2.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_53f734455d824f8eaabc23f5a0892a1d.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_5fd96e2063174483817b5dddb4248a12.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_e6356994c1fd46d5af107d9dc6674cd9.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_off00011b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B14 5316 bytes
SHA-256: b6741f2027fceae7c40918a8e9e7a28680875e669721d424f82c45388c734494
font_01_sfnt_off00012d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0E 10512 bytes
SHA-256: 99afaa4f9eee6a503ff1321468a5beef24351d8bd0334cd1f748585d2b213d08

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