Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd6ea05cf7d92f2…

MALICIOUS

PDF

82.2 KB Created: 2021-03-10 18:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 307363e3b5c59a5f113148d13dc00e7e SHA-1: fa5226d4bdb8b76794a8954fbca6e06a9684d794 SHA-256: cbd6ea05cf7d92f2b8dffbcfcaa26d3b97ea26c5f83d59551a7bda964cafd5b4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an external URI pointing to 'dugedepap.ru', which is likely a malicious domain used to host phishing content. The document body, though heavily obfuscated, suggests a lure related to health exercises, further supporting a phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/wb?keyword=exercises%20for%20sciatica%20caused%20by%20piriformis PDF link annotation
    • http://chelamela.org/balancing_chemical_equations_worksheet_1_answer_key_1-2032r3p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5fdcf954da358.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/estudio_biblico_de_mujeres_cristianas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_60251874a8272.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/889440910284mhp7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369768/normal_60085d1035b82.pdfIn PDF document text
    • http://nuvotana.22web.org/california_rules_of_court_citations.pdfIn PDF document text
    • http://reduslimitaly.website/vezeworenonuzuzoe68ux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387046/normal_601ed7ee0e8c6.pdfIn PDF document text
    • http://tixshopclub.fun/33_days_to_morning_glory_free_download3vlc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_601161d606c10.pdfIn PDF document text
    • http://delozofize.scienceontheweb.net/first_grade_math_addition_coloring_worksheets.pdfIn PDF document text
    • http://azorocheat5.xyz/maytag_stackable_washer_dryer_not_spinningaf2lr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_d651f331ac0d46f182cfb354a2b9a5b2.pdf?index=trueIn PDF document text
    • http://bipegokatif.onlinewebshop.net/articulos_cientificos_ecologia.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_319f9e61260f4de2ac2685ea858e9a50.pdf?index=trueIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_858433cbe01b4b30aaf1dff870d2fd98.pdf?index=trueIn PDF document text
    • http://xubikonenagoli.epizy.com/arcana_chronicles_book_3.pdfIn PDF document text
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_b70e3dd5aa044a89b9d1ab25c58b7c44.pdf?index=trueIn PDF document text
    • http://wupatime.epizy.com/dorekevi.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_c4b52f63d3914c96b54d8427ce98fea8.pdf?index=trueIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_b8ed71c5b8d542678eb6c99a2e8d2a3d.pdf?index=trueIn PDF document text
    • http://gudagugagazof.rf.gd/98856891380.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_off000102bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 5536 bytes
SHA-256: 277dc8e743b0e3a532773f9d1e45d4d430c812e89a926be747d21abd6518fbdb
font_01_sfnt_off0001158b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158B 10968 bytes
SHA-256: a1d4885b2237da62ca9c54078a17268892de801dac8ebd0f9ec0b1a62d358a6b

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