Malicious PDF — malware analysis report

Static analysis result for SHA-256 53552f83581c7c24…

MALICIOUS

PDF

81.1 KB Created: 2021-03-31 21:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a11ecbab3ba5b46460bdad5df549983c SHA-1: d8b1cb201315ec3ed8d3a743e6b814c251ec6d78 SHA-256: 53552f83581c7c249485f1ea69b3b476560dbae6221500e75dee87824ab00908
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9991

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 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.
  • 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://lozipotod.ru/wix?keyword=gift+for+husband+on+43rd+wedding+anniversary PDF link annotation
    • http://strongcreditscore.info/27764808223p4l3c.pdfIn PDF document text
    • http://euromarket.pro/how_to_clean_with_bissell_proheata1hgo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528780/normal_5fde2d989163a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_5fda0d5f48bb8.pdfIn PDF document text
    • http://amorexpo.com/80571762067xab94.pdfIn PDF document text
    • http://marketeuro.pro/46756535406sww44.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/collecting_case_knives_identification_and_price_guide.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/convert_scanned_to_word_free_offline.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/68099865065.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446289/normal_6001a318d55c1.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/21888472123.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/lukepepe/nulegifiwejusebemukujaba.pdfIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_9b0ffcb175334560a244328754107f2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/41390113243.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/news_reporter_jobs_in_chennai.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/car_games_free_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/kings_quest_6_cliffs_of_logic.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/rotona.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/summary_of_the_book_of_revelation_in_the_new_testament.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/how_to_convert_paint_into.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/formal_dresses_plus_size_long.pdfIn PDF document text
    • https://68a74d12-89ac-4a94-b826-09ad332a30bf.filesusr.com/ugd/1a0392_44fc0f566d9c4466a6f0d47b7d6c54bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gusule/48522524075.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_f25c1c9fdb58415880e490cf8fb80017.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDF 5812 bytes
SHA-256: 95d9ef0953e3c7d689fa5e7ec47e9cde622faf6ade6cad260ebb52cd5fd8a5ae
font_01_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 10776 bytes
SHA-256: 739c293031100e187eff839117008ee59baa01540655a6529476313a9e3fee61

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