Malicious PDF — malware analysis report

Static analysis result for SHA-256 6545589511579c14…

MALICIOUS

PDF

81.0 KB Created: 2021-02-26 06:33:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 08da9152b59640a3892f47d6424c1a56 SHA-1: 7bbe1321b731c690289528bc31bf3e8722c03799 SHA-256: 6545589511579c14ecf6dd5c1d990027eb26400eec92f54338f7f78808be121d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were extracted, the presence of many external links suggests an attempt to redirect users to malicious sites for further compromise. The document body is heavily obfuscated and contains metadata related to its creation, but no clear textual lure.

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://leonvi.ru/wb?keyword=axial%20scx10%20ii%20honcho%201/10th%204wd%20rtr%20rock%20crawler PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417535/normal_6015721c78df4.pdfIn PDF document text
    • http://testersairf.xyz/60967934911ediya.pdfIn PDF document text
    • http://jirafka.space/piano_chord_inversions_chart1yue0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485807/normal_5fe0d9c74f0c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376878/normal_5fc68689d7b70.pdfIn PDF document text
    • https://cdn.sqhk.co/xederebat/hf9fXkR/pattern_lock_screen_app_for_iphone_11.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/53751518277.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/niwepulewajasawisexopu.pdfIn PDF document text
    • http://lishop.site/multinomial_logistic_regression_sample_size_calculator6hsue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418973/normal_5fd131f8d4ce4.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/85263542837.pdfIn PDF document text
    • https://kukegogefip.weebly.com/uploads/1/3/2/6/132681459/fbd5adcee8ba3.pdfIn PDF document text
    • https://dumetokewip.weebly.com/uploads/1/3/4/3/134394823/fewekuxeg.pdfIn PDF document text
    • https://rofajubufilotol.weebly.com/uploads/1/3/1/3/131384128/7622040.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugukokoner.myartsonline.com/how_to_edit_text_using_paint_3d.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/how_much_does_a_cfa_earn_in_south_africa.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_off0000fc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC72 5560 bytes
SHA-256: c60759a2d865a1310af483db53e583e60917c701ce8e9b651740edb04b0f8c3e
font_01_sfnt_off00010f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F73 10996 bytes
SHA-256: 7cf54484489b9ae438013aef72a0ab65761585683aafaa9cfdbace99dcd954ce

Open this report in the interactive analyzer, or submit your own file for analysis.