Malicious PDF — malware analysis report

Static analysis result for SHA-256 e735e5cdd62ad567…

MALICIOUS

PDF

86.8 KB Created: 2021-04-23 00:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ce446a7fd1e0ae1912750fe0461c006f SHA-1: 561a242df9394feeacf8156717524e87ef00870e SHA-256: e735e5cdd62ad567bd5b3645bbe720391212488adfa74ed12b0c248f0964693c
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://xajibur.ru/strik?utm_term=casio+fx-9750gii+games+download PDF link annotation
    • http://nowtorrentz.com/dunkin_donuts_christmas_secret_menu01v3k.pdfIn PDF document text
    • http://generatorsale.ru/15398771258f9s7.pdfIn PDF document text
    • http://my-favshopd.online/75910082960eep42.pdfIn PDF document text
    • http://bitsracing.net/mecanica_vectorial_para_ingenieros_dinamica_hibbeler_12_edicionrvw4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447467/normal_5ff80c1d3e702.pdfIn PDF document text
    • http://fionainthefield.org/62811061701js6oz.pdfIn PDF document text
    • http://lnstagram-helping.live/cara_test_power_supply_tanpa_pcx0xll.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_5fe91b90efb00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448110/normal_602abdc6d053d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426549/normal_5ff767529fe98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_d27f9eece346485d97c971517f32ca21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3474f68-38e8-49a3-aaf2-c430ae72e2c6/excel_vba_find_longest_string_in_column.pdfIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_9b13665559bb4188b1b69911759c98a4.pdf?index=trueIn PDF document text
    • https://82a15d5c-09b3-4b2c-b6d5-cdf01964cb25.filesusr.com/ugd/5adcb9_99b325ce400940e28b86e1404d2c3c3a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1c9ff4-e8d5-42c7-a817-73cf41560f91/2018_dodge_grand_caravan_sxt_features.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21c4ca1-41fd-4ea5-834d-befe6bd9d603/what_to_put_on_resume_summary_for_customer_service.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/neken.pdfIn PDF document text
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_fc634d9b04a141ab9f00f011f8a6e94a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lopeteb/canadian_visa_application_form_outside_canada.pdfIn PDF document text
    • https://45180a89-8b92-4d54-a4c6-cdf0ad6af3c7.filesusr.com/ugd/2b98a3_e3823201144641b8a640185d9f5eacfe.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 5728 bytes
SHA-256: 54bc64588e87d65a5e828f28ab5948f5fd8e26ca71f38227415c2c107a107301
font_01_sfnt_off000111a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A6 11192 bytes
SHA-256: 122243d38c6e2ada3984755c34ed6a40d46fba00f403f23c1d455f2c2273d46c
font_02_sfnt_off00013813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13813 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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