Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b21ff247c7f27c1…

MALICIOUS

PDF

69.0 KB Created: 2021-04-27 14:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0a1ac89cb09f05c932da804ff12dfd38 SHA-1: 0fe06e9fd5316af6960af438bc7c35385a9c00f5 SHA-256: 9b21ff247c7f27c1bb7e8afbc659ed2e13ad31360ac96e8911ded5b7d495611c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs further supports a phishing or tracking objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=the+river+church+melville+sk PDF link annotation
    • https://cdn.sqhk.co/vamapoludi/R4xigbK/vusuwasitaderiko.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/idjbXhf/vabanawumumidikoxalorelar.pdfIn PDF document text
    • http://sberbank.link/celine_verbeeck_naakttjlmt.pdfIn PDF document text
    • https://cdn.sqhk.co/duromivap/ighjeib/disney_vacation_countdown_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/buichgh/50956063369.pdfIn PDF document text
    • https://cdn.sqhk.co/bibobovezave/Tgibgey/jakuxolexotafogalapolus.pdfIn PDF document text
    • http://apple-fruit.space/android_bitmap_recycle_necessaryw7rt6.pdfIn PDF document text
    • https://cdn.sqhk.co/sebetite/gfidjgO/megugagekunivafin.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/T23ggI1/fear_the_dead_walking_cast.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/acca_f6_taxation_book.pdfIn PDF document text
    • http://didibemez.scienceontheweb.net/35824253366.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/L2Thdii/megabus_chicago_to_detroit.pdfIn PDF document text
    • https://cdn.sqhk.co/sepolulegaba/5CHhjRJ/private_charitable_trust_deed_format.pdfIn PDF document text
    • https://cdn.sqhk.co/panufarubel/phhhbhe/lol_wild_rift_2020_walkthrough.pdfIn PDF document text
    • http://pogekoxuw.mygamesonline.org/tc_application_for_college_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/gYFfme5/6547682099.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/afrikaans_to_english_translator.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/hsighiq/6757755891.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/2f814936-15a1-40f9-9764-8cb7caa03b03/is_msm_good_for_your_hair.pdfIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/attendance_management_system_using_face_recognition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d849e59-1881-4304-bf24-3ee0eaa730e2/vigegigafawutibubor.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_off0000d365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD365 4904 bytes
SHA-256: 1e9ba6c683dabc08222212299937fbf154ce323fa9322a8ca3b1f968ac8d6f71
font_01_sfnt_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 10280 bytes
SHA-256: 685954aea50419f00c2bc79d098bd571a2eb60a06246874c6c109a53faaa7c7e

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