Malicious PDF — malware analysis report

Static analysis result for SHA-256 61094557df73bc29…

MALICIOUS

PDF

79.9 KB Created: 2021-04-08 09:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 804492b21e7d49dd51c98073ce87cdca SHA-1: 23ac5b70db414670bf8f6feb86ce7f5d3c484939 SHA-256: 61094557df73bc292c10a8cf901d0e3894c2c47c70e6525a424bc88fe6a17be4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=seiko+prospex+200m+diver+solar+chronograph+sbdc061 PDF link annotation
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/2be175291b.pdfIn PDF document text
    • https://cdn.sqhk.co/woravejafeto/iiggie4/solisasit.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/Uhf39he/8898291679.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/jjgcjiX/bluestacks_hd_app_player.pdfIn PDF document text
    • http://contact-git.top/crusader_kings_2_free_download_3.3urm0f.pdfIn PDF document text
    • https://cdn.sqhk.co/dopinaku/xwFggij/japewibitotolone.pdfIn PDF document text
    • http://disconto50.info/signed_first_edition_of_peter_and_wendymdpx0.pdfIn PDF document text
    • http://bepidotagexaxuw.iblogger.org/jury_duty_summons_letter_template.pdfIn PDF document text
    • http://varietystore.website/how_to_connect_oontz_speaker_to_laptop5lu3e.pdfIn PDF document text
    • http://strgb2.ru/doraemon_ka_cartoonqgzri.pdfIn PDF document text
    • http://giftcard-sale.store/56317133247vgq6u.pdfIn PDF document text
    • https://wafumaxa.weebly.com/uploads/1/3/5/4/135400811/5263181.pdfIn PDF document text
    • https://lisopivoxo.weebly.com/uploads/1/3/4/9/134901835/9159683.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/986993f8-77e6-4fc5-aa90-3f6043a078f7/professional_english_speaking_words_daily_use.pdfIn PDF document text
    • http://goxonigugabuso.epizy.com/can_best_buy_fix_beats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93514d68-3e8c-4f90-a673-ffbb7efb43e4/85997877941.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_69bcbe3f00ca40e0942457e1cedc8d6b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2885f66a-6a27-4dde-818e-703dd4f3a15c/wonderwall_projector_troubleshooting.pdfIn PDF document text
    • http://xorevepol.epizy.com/is_oster_a_good_brand_air_fryer.pdfIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_482aa5295b274cf3b7156bc1630dd92d.pdf?index=trueIn PDF document text
    • http://nedafab.rf.gd/tales_from_the_loop_imdb_cast.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_off0000f5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 6404 bytes
SHA-256: 2676f140c5cb89997729730cc3cfad0992f3709cafff228d8378018cd4712555
font_01_sfnt_off00010b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B79 10884 bytes
SHA-256: f10742f524c143b1e1ee5991bc695cf5b5c6016ad326ff4be595d83aef24af4f

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