Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb36c922e23ba4c…

MALICIOUS

PDF

78.2 KB Created: 2021-02-21 18:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 11ddeac8d2a23e74ac10d3bc5615d37a SHA-1: 6ed16cab6b2473969953c2c4b804f27eecd3f431 SHA-256: 2bb36c922e23ba4c792b48c2dfb03c6816ce51b231685325aa9edc3691f1791f
224 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded links, with at least one being invisible and pointing to a suspicious domain, likely serving as a lure for phishing or malware delivery. The presence of multiple links on disposable hosting further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • 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://yafferge.ru/123?utm_term=honda+civic+2006+radio+code In PDF document text
    • https://lexedixejorew.weebly.com/uploads/1/3/1/4/131438453/4223647.pdfIn PDF document text
    • http://probmaka.tech/bavadikem2c99v.pdfIn PDF document text
    • http://kifenefazujiz.iblogger.org/fillable_demographic_information_addendum.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/2hiB7c8/xiaomi_yi_mini_dash_camera_arac_kameras.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/gukerosazesuzarwhrue.pdfIn PDF document text
    • http://naturaleone.space/dupadamed92hnk.pdfIn PDF document text
    • https://ludubilataso.weebly.com/uploads/1/3/4/7/134719947/2808251.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/tosekuxaw-fiderut-vudewamukixeb-tepozuz.pdfIn PDF document text
    • http://raftgjgr.space/gimoxumenuxipivpr8h9.pdfIn PDF document text
    • https://bofopigefofimun.weebly.com/uploads/1/3/4/0/134016695/8125986.pdfIn PDF document text
    • http://quickstore.pro/shimano_di2_installation_toolrxhiz.pdfIn PDF document text
    • http://ideal-it.fun/how_to_find_triangle_area_with_three_sidesadvm7.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/2jhgcYs/25184816488.pdfIn PDF document text
    • https://cdn.sqhk.co/fupipevu/heyPZid/free_soccer_streaming_apps_for_android.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/sogovekevi/atc_around_the_world_free.pdfIn PDF document text
    • http://botusijafen.rf.gd/make_text_bold_in_xml_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/types_of_collisions_impulse_graphs_worksheet_answers.pdfIn PDF document text
    • http://keburebaxoza.rf.gd/bechara_dil_kya_kare_karaoke.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/korikutarezusedadeb.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/vudixorufivufaramo.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_off0000f5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F3 5172 bytes
SHA-256: 6e06780055ecf95026f5a1d7f00e7c0da57e14a5897993281f326070316d8340
font_01_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 10792 bytes
SHA-256: 2d9c0eb56fe611e731f273ad963ac42634860bb6300a01c97f27fc5a5126e69b

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