Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52837cb6e49217f…

MALICIOUS

PDF

59.1 KB Created: 2020-12-03 08:35:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ad1deef04b8687a1cd4d1b441963e974 SHA-1: 20c69c5b355ed7b3eb3a7040b68f3b1d07908c0b SHA-256: a52837cb6e49217f2313b11d023d99dc7c55c6983776978f947b9c0a1a4ba51d
156 Risk Score

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 0.9996

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 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://traffnew.ru/123?utm_term=conditional+statements+worksheet+with+answers PDF link annotation
    • https://fevuvewuvadudu.weebly.com/uploads/1/3/4/6/134650824/liwexesameri.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/9442b90b9.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/paruvitabolowoted.pdfIn PDF document text
    • https://nuxagaselupig.weebly.com/uploads/1/3/4/0/134016775/kijutanodobifubop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1f57d2806c62ec20050a/1606229847508/80715856170.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e7c288c99b6d37a72027/t/5fc11972145a8629dcd80bff/1606490482841/49367450211.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf27fa97599144ebcc593/1606283904508/get_free_rubies_for_hidden_city.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ae84085bf90c0e029602/t/5fc43641f81c9a2a0c27a993/1606694466016/lidimadabakilapidejig.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/cisco_packet_tracer_7_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/jezus_elete_magyarul.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1407d8787e879896e58f6/t/5fc5782af3de5e49b51f16c4/1606776874891/23275137037.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6a9a1972c46e3c9730a6/1606380189190/scholarship_opportunities_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc042db8787e8798968ae67/t/5fc4fe1f145a8629dc4d9ecf/1606745632205/bill_burr_im_sorry_you_feel_that_way_review.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8f692c50b1a1e77efcd/t/5fc129f89ee0f32b877ca520/1606494713754/getting_nerdy_llc_evolution_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50f1792c50b1a1e923a88/t/5fc6468508845d0924601bd5/1606829702780/sheltered_synonyms_and_antonyms_exercises.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

Related samples 8

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_off0000ae74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE74 5128 bytes
SHA-256: b79c72b876ba5c4216c1c3a02838a66c10b13ceb5d48a3f0fb4025dfe2f62abc
font_01_sfnt_off0000bfc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC0 9232 bytes
SHA-256: f14cac1eb3c32645f90e817f870b235824cdf6cc133f4f212bd32dd4da91a836

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