Malicious PDF — malware analysis report

Static analysis result for SHA-256 36707d6b30c11f51…

MALICIOUS

PDF

79.9 KB Created: 2021-03-10 05:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b9ce394bb91cbd6d867839667dcb1d10 SHA-1: 90eb69b5845182d9249138b2a90cfa6209ad86e1 SHA-256: 36707d6b30c11f5157daf8b21ad8c7ff8806453e484d8265a40bc55f06b4f04e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary external URI pointing to 'https://pelibibifir.ru/123?utm_term=securecrt+8+portable', suggesting a lure for software downloads or credential theft. The PDF also exhibits characteristics of a link farm on disposable hosting, further supporting a malicious intent.

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://pelibifir.ru/123?utm_term=securecrt+8+portable PDF link annotation
    • https://cdn.sqhk.co/dodamewope/jj1Bzhi/56655477420.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/LgiTihh/fujabo.pdfIn PDF document text
    • http://pagexonani.iblogger.org/new_testament_church_of_god.pdfIn PDF document text
    • https://lezafopiga.weebly.com/uploads/1/3/4/6/134628758/4b6c459fa28.pdfIn PDF document text
    • http://vash-komfort5.ru/62071111495rc0ce.pdfIn PDF document text
    • https://cdn.sqhk.co/jozanafe/ghqnxgm/luwosejevirolenuxek.pdfIn PDF document text
    • http://top-agent.ru/software_development_engineer_mcafee_salary_india9x7ig.pdfIn PDF document text
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/8577619.pdfIn PDF document text
    • http://infonewstravel.com/87402809609j5ide.pdfIn PDF document text
    • http://sewamagiz.66ghz.com/18556121936.pdfIn PDF document text
    • http://legivupipofu.66ghz.com/medevejovabul.pdfIn PDF document text
    • https://jaluburevajag.weebly.com/uploads/1/3/0/8/130874017/xinorezulipow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c177b2f4-c25e-4b88-8806-55ba17727d79/what_is_newsmax_saying_about_the_presidential_election.pdfIn PDF document text
    • http://lekowezitodog.rf.gd/49714884108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f78c105-04f7-4114-a124-b742c300ddfe/44936467100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/923cef88-c971-4180-8e5d-3379d2059ad1/bunokazusez.pdfIn PDF document text
    • http://zigubogujivo.epizy.com/captive_minecraft_5.pdfIn PDF document text
    • http://bofalonulupujo.rf.gd/91271491592.pdfIn PDF document text
    • http://vufigenetusanu.epizy.com/pevulubav.pdfIn PDF document text
    • http://firiveperoju.epizy.com/what_are_the_5_types_of_informative_speeches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98475186-8fea-45d8-953b-418b299b00ce/30426449413.pdfIn PDF document text
    • http://nunowezowijoper.rf.gd/alphabetisation_vers_l_emploi.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000e68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68C 6440 bytes
SHA-256: 705377623a4c4344e02470fedf876d1ed6f0c7c0eac322cafb15afc9430d14bf
font_01_sfnt_off0000f680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF680 5184 bytes
SHA-256: 5904802955d74501aac41269778d5454a939987e84d91ba8b320a3b9a4e91a37
font_02_sfnt_off00010831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10831 12824 bytes
SHA-256: 53db094a436d490d47736b2c29adb277d97e244159763c08863faa39e4734955

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