Malicious PDF — malware analysis report

Static analysis result for SHA-256 552422c75f7b2ec4…

MALICIOUS

PDF

114.0 KB Created: 2021-03-24 11:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec69f4299aecbc86761c4f8f14663cf1 SHA-1: 0f27f76e3c33c43350b5c371803b10708f10261e SHA-256: 552422c75f7b2ec48ef5c8d99971da779463e9c3ace77f014607cac590c2d79c
126 Risk Score

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 0.9980

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/award?keyword=ashrae+handbook+fundamentals+pdf+free PDF link annotation
    • http://garanibukumom.scienceontheweb.net/piwunogawejifufatefo.pdfIn PDF document text
    • http://teren.fun/59103801880e1203.pdfIn PDF document text
    • http://zoosalon.org/988536709809sr.pdfIn PDF document text
    • https://cdn.sqhk.co/papedajapej/Whiijhj/gunship_iii_strike_apk.pdfIn PDF document text
    • http://7lessons.fun/33902181424e0wv2.pdfIn PDF document text
    • http://sberetransfer.online/glencoe_algebra_1_8-_3_practice_answerssekqv.pdfIn PDF document text
    • http://the-job.ru/ups_apc_back_550va_330whq6zu.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/j1YxIgg/rapalitenezelojofefaleja.pdfIn PDF document text
    • http://parhelifrl.space/global_citizenship_definitionom311.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/asfixia_mecanica_por_sofocacion.pdfIn PDF document text
    • http://apparentlyopt.com/atrial_fibrillation_heart_failure_guidelines7vcgq.pdfIn PDF document text
    • http://instapriz.website/54472478213fldxu.pdfIn PDF document text
    • https://cdn.sqhk.co/vokalater/b9cejf4/bibexewetobi.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sirowozikuko.epizy.com/conduit_company_report.pdfIn PDF document text
    • http://verirajoxa.epizy.com/television_advertising_definition.pdfIn PDF document text
    • http://giduzorim.epizy.com/information_filed_arraignment_waived.pdfIn PDF document text
    • http://xiriranur.epizy.com/near_double_facts_worksheets.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/2015_lexus_gs_350_awd_specs.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/76665977899.pdfIn PDF document text
    • http://veruzixiki.rf.gd/burikipejamu.pdfIn PDF document text
    • http://jedovimesize.epizy.com/parts_of_the_human_brain_and_their_functions.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000196e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x196E1 20640 bytes
SHA-256: f4adecb3bfc7e41ede4cd8d9224f8018793047fd410b404b0f9b5d28c3798e40
font_00_sfnt_off00014c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C77 1660 bytes
SHA-256: 4da5cf35b63a23550e73e38c57277ccc266923e7b04d9c8dd3179b2cd11f7304
font_01_sfnt_off0001548a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1548A 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_02_sfnt_off00015e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E85 5472 bytes
SHA-256: cec596576bd202d3a1b7bd9a8dc63e634e70a7b0759f1f27b1b2568feca798fb
font_03_sfnt_off000170ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170EF 11080 bytes
SHA-256: a503e5a9f6b52ddba433ecd50a732f873e39a0eddf40e012fc84b9fb41d13a6b

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