Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2cb63d5e5cd901…

MALICIOUS

PDF

78.8 KB Created: 2021-03-05 00:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f5794623f9aeeaaf0c76b810df153e05 SHA-1: cc422083e2895778258c7b4e92481e0195c36a90 SHA-256: 8f2cb63d5e5cd901091e8ef94adf919b0ea02a3710f65abe33a52e199afb1c2c
196 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with several heuristics flagging it as a link farm and suspicious lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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+100+book+2+pdf PDF link annotation
    • http://fajujefa.getenjoyment.net/just-in-time_systems_are_considered_part_of_which_primary_activity_in_the_value_chain.pdfIn PDF document text
    • https://zupakikaxabu.weebly.com/uploads/1/3/1/3/131380404/jamapipazoxen.pdfIn PDF document text
    • https://sapobukemofox.weebly.com/uploads/1/3/5/9/135974899/2397804.pdfIn PDF document text
    • https://mepalowe.weebly.com/uploads/1/3/1/0/131070826/6542376.pdfIn PDF document text
    • http://ig-supportcenter.xyz/mingling_of_souls_videosslv36.pdfIn PDF document text
    • https://lunisaga.weebly.com/uploads/1/3/5/3/135302545/marivajorajufepisa.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/tenasolakadukatoparunon.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/befenupufizesajubo.pdfIn PDF document text
    • http://pubggaming.online/ejercicios_con_la_le_li_lo_luessna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xikusaduxofi.atwebpages.com/best_phishing_tools_kali_linux_github.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/business_studies_report_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/old_age_pension_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/84949446164.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/vintage_banner_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/65732906557.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/2nd_line_old_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55729d9f-091e-45e0-af9c-82a00233bd52/dipafenemixas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dee37f12-63b6-46ac-9126-355a64127ea3/kenmore_elite_king_size_dryer.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/3d_wood_world_map_wall_art._large_wall_decor.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/how_to_change_water_filter_in_kenmore_coldspot_refrigerator.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_off0000f5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BB 5092 bytes
SHA-256: 1adf7feae12de0b490366381913140bb856484ac8d7a66c57966ce908fed66d9
font_01_sfnt_off00010718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10718 11548 bytes
SHA-256: f17b240dcba220b074b3fa89ebd4d4373bfc4cbee253b912103472ef960ea717

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