Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4e56b1f309c53f…

MALICIOUS

PDF

85.0 KB Created: 2021-03-29 14:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7264f135701d0fbf318592900eb57deb SHA-1: 92f4a02fd9ad9f1673cdaac71ec05511bbacda24 SHA-256: 1a4e56b1f309c53f5df11864d79ae7849cd4e395ca9a6a199f6dfb26a98d80ae
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 0.9995

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/wix?keyword=doremy+sweet+antinomy+of+common+flowers+pdf PDF link annotation
    • https://cdn.sqhk.co/gifexajed/hhC7VX4/39643373255.pdfIn PDF document text
    • http://wolotalute.iblogger.org/fannie_mae_borrower_signature_authorization_form.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/organizational_behaviour_and_management_ivancevich.pdfIn PDF document text
    • http://fitokaps.xyz/google_assistant_apk_for_android_marshmallowh782b.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/ibiajgg/41002920206.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/math_symbols_and_meanings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459057/normal_604d25f744f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465263/normal_602166cb8e4a4.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/dezavetobafo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_5ff8020d6754b.pdfIn PDF document text
    • http://bonozowibewoz.mypressonline.com/aceptacion_radical_gratis.pdfIn PDF document text
    • http://gelivebun.22web.org/guess_what_game_answers_flipkart.pdfIn PDF document text
    • http://fusobilel.iblogger.org/roland_fantom_x6_keyboard_workstation.pdfIn PDF document text
    • http://vas-rem.ru/fetodurigedazakimabinazs2k9r.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/gXgjT7f/xibexafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_602f439a5ae47.pdfIn PDF document text
    • http://nufemewi.iblogger.org/54415951744.pdfIn PDF document text
    • https://cdn.sqhk.co/bizujonad/lhhLibs/bad_traffic_accident_today.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasesazolaf.myartsonline.com/lapuvuxajaxefak.pdfIn PDF document text
    • http://nobufep.epizy.com/acrobat_reader_10._1_2_free.pdfIn PDF document text
    • http://gapisoga.rf.gd/ba_bsc_admission_form_pu.pdfIn PDF document text
    • http://duvasupe.epizy.com/bertelsmann_transformation_index_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC70 4864 bytes
SHA-256: 1cd1336038368b32cdf8b83306c3bf0e685dfcacca0e757e29ddb4ad72d1e8f8
font_01_sfnt_off00010d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D65 5492 bytes
SHA-256: 617b0a4aa17f85f6cf8bec52fbc73ab3f1ab09329888ad62e8b4042ad8aa1585
font_02_sfnt_off0001201d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201D 10548 bytes
SHA-256: 5dc13b4b416eb7214c9c40f49472053dba1a6da2cd44c205b6e59327d8e25f38

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