Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a4a5801806f4cb…

MALICIOUS

PDF

82.6 KB Created: 2021-03-16 18:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9cee2e857ebc0899fec8a6f288aff5ad SHA-1: 9c32e29f35083234b4255b1803ccc1360300058e SHA-256: 43a4a5801806f4cbd36812fccc9b849f12578ed2c6cba36283cb44b3e759a581
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • 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://baarspo.ru/award?keyword=cats+in+the+cradle+tab+pdf PDF link annotation
    • http://zaxegod.getenjoyment.net/34837964568.pdfIn PDF document text
    • https://cdn.sqhk.co/gabunufu/EggCDFG/bupazilezijo.pdfIn PDF document text
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/lafuxi.pdfIn PDF document text
    • https://wakebanimoxebej.weebly.com/uploads/1/3/1/3/131383753/8291627.pdfIn PDF document text
    • https://pazerutafu.weebly.com/uploads/1/3/5/3/135392620/575f9cc.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/cema_belt_conveyors_for_bulk_materials_7th_edition.pdfIn PDF document text
    • https://rawonosegapit.weebly.com/uploads/1/3/5/3/135314608/dodoref.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/creative_writing_prompts_for_adults.pdfIn PDF document text
    • https://korexabareruwa.weebly.com/uploads/1/3/2/6/132680962/78f618.pdfIn PDF document text
    • https://vademakab.weebly.com/uploads/1/3/1/3/131380849/464495.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/Uid1iiv/pico_de_gallo_english_definition.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/bipusisonaraloregepudi.pdfIn PDF document text
    • https://ruwatija.weebly.com/uploads/1/3/4/8/134846771/luzibod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sisaxu/kamonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acdaefad-7b31-4421-bfd5-e0ef29b5fa2f/wukilowafugafulowazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c33034-65a0-4bf9-9d5d-6c607827928d/is_starting_a_blog_free.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/will_a_harbor_breeze_light_kit_fit_a_hampton_bay_fan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f14ac80-4a80-45c9-8000-6f8f72ca1a92/luruvubafu.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/identifying_verbs_worksheet_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/71340967397.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/gavebogutusog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be032be2-d4c6-4a9d-9639-34af89e24b00/bebokuvosavatiradivaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08d7444-2a58-481d-8ed8-b44ed054ea2d/the_steam_servers_are_too_busy_to_handle_your_request_414.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 5084 bytes
SHA-256: bf892cd2d77474c39ac995405911c9954a9871a23b1fdea1a71b4607d29a7e69
font_01_sfnt_off0000f7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AF 6664 bytes
SHA-256: 36a5d8372ff6da78bbf9a5601b2053d79c23655174a72aee3b51a7c4f27d7ae9
font_02_sfnt_off00010937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10937 10852 bytes
SHA-256: 97d11222f6a157e345c4f356768dfcb6284560714c96772cd52c2afde03e860a
font_03_sfnt_off00012e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E91 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.