Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a358ea9b6893fd5…

MALICIOUS

PDF

84.2 KB Created: 2021-03-21 10:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b10f62079f4267bc21c88e82ca088124 SHA-1: 8d9aa5a95528cbf6bb7d414b05fa5dcf66f62d87 SHA-256: 2a358ea9b6893fd585e0bc53a682d1704995fbe5c8b07f1ff4a358dca3a9a11d
186 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 0.9993

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
  • 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.
  • 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://jumiwimov.ru/wix?keyword=la+guajira+peninsula PDF link annotation
    • http://morpeoplelife.ru/peace_is_every_step_review7w2hg.pdfIn PDF document text
    • http://foyou.store/65141605837svi99.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/3220758.pdfIn PDF document text
    • http://koteyarn.moscow/76271556259jkzo2.pdfIn PDF document text
    • http://lollipopa.online/how_to_clean_the_filter_on_a_whirlpool_washing_machinew9d00.pdfIn PDF document text
    • http://successinyourlif.website/aplicaciones_de_reacciones_redoxirjbi.pdfIn PDF document text
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/kawijivuxeli.pdfIn PDF document text
    • https://girisuwudogepo.weebly.com/uploads/1/3/0/7/130776006/b64d53a.pdfIn PDF document text
    • http://hookup158.fun/fenifuxelibociufx.pdfIn PDF document text
    • http://carinsusa.info/xepibepf8cd.pdfIn PDF document text
    • http://boevoenlp.com/40489221400iaq79.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/busurasu-kokoluro-jadofi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezeladi.rf.gd/tebudovoneraxewenonazedo.pdfIn PDF document text
    • http://tixololug.epizy.com/54928777637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e5b6868-0b04-4a97-9a24-9ace2714a453/2006_jetta_2.0_transmission_fluid_check.pdfIn PDF document text
    • http://fekobovovexi.epizy.com/14185228192.pdfIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_7f604610222843f6a4118ba03c23b042.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_02104ee7fc74409e93a4613bc92afed6.pdf?index=trueIn PDF document text
    • https://2cc935b2-b854-4d3d-8499-e3bac5ec7384.filesusr.com/ugd/2e82fc_3b9f6e3f49be4b7299c9813d96faf716.pdf?index=trueIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_1e6698a22eaf4b9499827b07af8720c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ded396-b7e7-49fe-95ab-d9ce399f8218/pujuboxokibonime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b04c9b-12fb-4c94-ab0d-b1ba6b6993d6/wendys_cheeseburger_nutrition_information.pdfIn PDF document text
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_297d4e6d8f0e4c1c9fa6509b2a7a63ff.pdf?index=trueIn PDF document text
    • http://pibufesoxol.epizy.com/sample_annual_physical_exam_form.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_off00010887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10887 5004 bytes
SHA-256: a49a51e0330fc5e6a107f9f17b64d0bfe0c23fe52858843a381b7a5e4e300fb8
font_01_sfnt_off000119a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A7 12396 bytes
SHA-256: 7d2fe8d1f131999d903796e56df5909212e80f92fe4c6ed82e9f5601e2717329