Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bade5d1b3201dcb…

MALICIOUS

PDF

81.5 KB Created: 2021-03-24 11:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 670c193209123e7064292514a2f29527 SHA-1: 9051fb48948971e5237b528489dc8bc74b696953 SHA-256: 3bade5d1b3201dcb5834053ebeaf69481d49e4dcae3b63f64a5ce541dbbef725
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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 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://golowaki.ru/strik?utm_term=honeywell+lynx+touch+security+system+user+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411219/normal_6017b33987c05.pdfIn PDF document text
    • http://fabujisaw.mygamesonline.org/kindle_oasis_e_reader.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/xapitirefogixu.pdfIn PDF document text
    • http://farunoraxukiz.getenjoyment.net/7990097656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453579/normal_603deca2bdc41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_60336fb2e7fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443819/normal_604d8cef41007.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/xuzed/manuta.pdfIn PDF document text
    • http://fuvoxibid.epizy.com/duraflame_quartz_heater_parts.pdfIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_b3fe9540606040b6b8aa3276e28c9b55.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_e77948ac31df48569c08512a76a778ce.pdf?index=trueIn PDF document text
    • http://senesijosezetu.myartsonline.com/barron_s_ielts_practice_exams_4th_edition.pdfIn PDF document text
    • https://9c33b4df-6f14-41ad-9e94-a3a23f7ed20d.filesusr.com/ugd/2a975f_98d94172fabd40869f68d63f0560e137.pdf?index=trueIn PDF document text
    • https://0c1adbbe-b65a-4c28-9da2-87cea21e0636.filesusr.com/ugd/496951_a509100a63b2499da61d837cbda6a00b.pdf?index=trueIn PDF document text
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_bea4ce4137764222940a97968e3feb0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setigafat/troy_bilt_bronco_ratings.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/allen_bradley_slc_500_training_manual.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_0b9a3951c824440387d9e23b501394e4.pdf?index=trueIn PDF document text
    • http://tisikifapov.rf.gd/business_process_change_paul_harmon.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/todetujim.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_off00010226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10226 5364 bytes
SHA-256: d99a52ee6af12f8583e23662f51eeda0aff842e7675869e43a4b9b7f01231eb0
font_01_sfnt_off00011453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11453 10488 bytes
SHA-256: 54f0e80f6e3c5dd55b3d31d81fabef07f64fc087f55e4d6fd8ee520068821fdd

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