Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd2d812fb82d119…

MALICIOUS

PDF

79.0 KB Created: 2021-03-27 10:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 17f9943975446147eec85cac8b078919 SHA-1: 53f842381faeafdc14771b67d7265b70ff9571d4 SHA-256: 9dd2d812fb82d1198debec4a60e1043e9f05bdab7c0c549fd4d2cf36d82f2a76
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 0.9997

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://xezojetit.ru/strik?utm_term=popular+phrasal+verbs+with+examples PDF link annotation
    • http://lerob.info/pinobon12am.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/davies_textbook_of_adverse_drug_reactions.pdfIn PDF document text
    • http://prizinsta24.space/metobipisowoxu2j33j.pdfIn PDF document text
    • http://wurenuzuludesu.22web.org/osrs_crafting_guide_1-_99.pdfIn PDF document text
    • http://chambreop.xyz/fishing_guide_salary_ukxqjg2.pdfIn PDF document text
    • http://najezeb.22web.org/61908415799.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/compound_personal_pronouns_worksheet.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/928e4a8d-6953-44c1-9fab-3bdafa4ed69c/cateye_velo_wireless_review.pdfIn PDF document text
    • http://sasirirufib.rf.gd/definition_of_management_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5b6f50-433e-4f49-8f1c-ec22503be734/44169482890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d2f907-2840-43ee-9702-a1f3a8ec62a3/cognitive_behavioural_therapy_for_dummies_free.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/nopunatotuz.pdfIn PDF document text
    • http://bulagim.epizy.com/dumplings_sydney_broadsheet.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/3172144710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d25e06cc-c43b-4c8d-9b11-67d3469825d5/como_cambiar_el_titulo_de_propiedad_de_un_terreno.pdfIn PDF document text
    • http://gegekekesi.epizy.com/letoko.pdfIn PDF document text
    • http://mopakutabeka.rf.gd/bivonarunagojovu.pdfIn PDF document text
    • http://wonitijaxexilo.rf.gd/continuidad_de_los_parques_julio_cortazar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5693e770-ff71-44c7-828a-5a2b5258fec3/nonatipazarisirigaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd39ed22-b15d-44c2-b1d0-4ce2fe739203/intermatic_dt620_timer_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef18a0ab-3d7e-4e40-b62b-f62e58748573/what_kind_of_transmission_fluid_does_a_2007_nissan_altima_take.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_off0000f93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93F 5420 bytes
SHA-256: 042c8ecefeb488e3c77ee356d7130984f58be95c57192f8e1dd95db19bc9b950
font_01_sfnt_off00010b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B91 10220 bytes
SHA-256: 8ece10fb888338724e43659f34a20bad3fb7c076045bc7d1f89aec10b949629d

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