Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37d35f4b933fc5f…

MALICIOUS

PDF

82.1 KB Created: 2021-04-15 18:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc0351a4cee906fccfb2c05c1cda3a0a SHA-1: 9c13c42d8d5b1c4b9a6de0eb5d77ab16b77506f9 SHA-256: d37d35f4b933fc5f5d2a2b3bcfc4c32e47da45461fccf0a5f8cd31dd10378937
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 0.9995

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://dugedepap.ru/strik?utm_term=how+to+reset+a+cateye+bike+computer PDF link annotation
    • https://cdn.sqhk.co/bebomopakax/XhfJjf3/two_piece_stacked_leggings_set.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365649/normal_5fe600c277325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409254/normal_600ccfbf82b14.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/eUbdGHl/69111992835.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/jarawonegejemudevikurova.pdfIn PDF document text
    • https://cdn.sqhk.co/bavisimupux/jbbjdkv/evertech_sandbox_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_602c2f8e32ebf.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/analisis_y_diseo_de_sistemas_de_informacion_james_senn.pdfIn PDF document text
    • http://bunagutafa.getenjoyment.net/chemical_diet.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/purogateba.pdfIn PDF document text
    • https://cdn.sqhk.co/nubotixuf/ghcgdhj/19951974909.pdfIn PDF document text
    • http://gumidaz.medianewsonline.com/calculus_by_george_b_thomas_12th_edition.pdfIn PDF document text
    • http://ziximotizaned.medianewsonline.com/karakteristik_acetobacter_xylinum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470017/normal_5ffcc1551f565.pdfIn PDF document text
    • https://cdn.sqhk.co/lodoseduler/bHaTjbA/36526349634.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tuparibuju.atwebpages.com/barcos_para_colorear.pdfIn PDF document text
    • http://keputeka.epizy.com/juego_commandos_2_para_android.pdfIn PDF document text
    • http://matefurixexa.epizy.com/methodist_church_ghana_almanac_2019.pdfIn PDF document text
    • http://denekiwipe.rf.gd/badminton_new_rules_2020.pdfIn PDF document text
    • http://petojijoxura.onlinewebshop.net/inspire_high_school_students.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/how_long_can_i_use_the_graco_snugride_35.pdfIn PDF document text
    • http://vewemisesafi.epizy.com/kegudip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF549 5184 bytes
SHA-256: ed79ad7fb3f2169c75c736d15bcc5c81deb70020c515485a3b0b05a0577bffe4
font_01_sfnt_off00010706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10706 10860 bytes
SHA-256: 7a1aeeaad5a26b21ad0489390097c0c87dda9334f433aad3905cb017f853eaab
font_02_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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