Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e5ab7eb5150956…

MALICIOUS

PDF

81.0 KB Created: 2021-03-21 05:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 028dd2b5933d578a3bef17400c4c3c9c SHA-1: 9c925f86af86c00cda27e0a6cddb9f3d26386944 SHA-256: b3e5ab7eb51509560b60d1b62befe886d30376479511e5fa753fd3ba3fadea4d
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 0.9993

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://lozipotod.ru/wix?keyword=defiance+weapon+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369933/normal_60170099a0487.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/bexodol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_603fe20c28d76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426953/normal_5fe810ec4a04b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449965/normal_5fc7ff414cac9.pdfIn PDF document text
    • http://rifijetuvijilam.medianewsonline.com/child_psychology_malayalam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_6015ebb9eced4.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/how_to_set_up_screen_mirroring_on_vizio_smart_tv.pdfIn PDF document text
    • http://fonudesuwobulud.mygamesonline.org/barefoot_investor_online_free.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/52953095332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480904/normal_6042c21733d2f.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/96039674741.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/linear_inequalities_word_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejimafalun.onlinewebshop.net/27465107236.pdfIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_df97849ce7da4d84adbf35f7257f1af0.pdf?index=trueIn PDF document text
    • http://zigevunagenape.epizy.com/vans_unisex_old_skool_sneakers_-_black_port_royale.pdfIn PDF document text
    • http://sewemira.atwebpages.com/39855012119.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_61eefc1f04fb4b92af947bbcdc7a9cca.pdf?index=trueIn PDF document text
    • http://vineberute.epizy.com/12834665342.pdfIn PDF document text
    • http://rajafidaforuzav.epizy.com/77930924181.pdfIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_b9efe2b7888b4988b55eeafa42289852.pdf?index=trueIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_d89fb20fde3f4c5ab59382358112cc9e.pdf?index=trueIn PDF document text
    • http://dokidakalivuwel.rf.gd/fofowiwifipixutepogomek.pdfIn PDF document text
    • http://fipamopiwip.epizy.com/ramsay_maintenance_technician_mechanical_test_study_guide.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_off0000ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCD 5108 bytes
SHA-256: 30ecaa7a09b578e6705f5f257ff121f09fcaf261f6f1a73f3efa5eef5ad1d0f4
font_01_sfnt_off00011164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11164 11020 bytes
SHA-256: 96083ce1d0ee9db490c58464af952081da793d1acf5a79a0079d91eec5ce1a8d

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