Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ca2e4457af47c9…

MALICIOUS

PDF

78.7 KB Created: 2021-04-06 21:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 758cf6fcc0270811c9a764325225455f SHA-1: d2072980296248cd566efa217f614dcb2ef58b9e SHA-256: 58ca2e4457af47c987c1ccb18d9ae711798edcf49d520fa1c3164b23a1d3fbb7
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely leading to a malicious payload or credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zajinet.ru/123?utm_term=suzuki+bandit+gsf+1250+sa+manual PDF link annotation
    • http://axecheat1.xyz/pifuwokorigipuvexuxeguw2z8li.pdfIn PDF document text
    • https://japidofig.weebly.com/uploads/1/3/4/5/134503064/donebarorotof_jopore_salapox_fapatunumafomom.pdfIn PDF document text
    • http://chtotakoeverti.biz/51284245446b1lj0.pdfIn PDF document text
    • https://pagopolekabob.weebly.com/uploads/1/3/4/3/134305888/julubob_xewituzuba.pdfIn PDF document text
    • https://fuwizugirizuj.weebly.com/uploads/1/3/4/6/134611345/bemojuzelexin_variwamat.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/the_hollow_menut1m68.pdfIn PDF document text
    • http://ideaita.fun/nijiguzixatinaxisurib98vc.pdfIn PDF document text
    • https://terogoke.weebly.com/uploads/1/3/4/5/134587715/sinijovusaxitulowuko.pdfIn PDF document text
    • http://padlamadla.site/63657554940mn6av.pdfIn PDF document text
    • http://winsl.space/3956312173s59n1.pdfIn PDF document text
    • http://esportzmlevent.com/children_s_malayalam_dance_song5m0i0.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/dagifalutemir.pdfIn PDF document text
    • http://allmedbook.com/wallpaper_hd_android_anime_girlwr453.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
    • https://uploads.strikinglycdn.com/files/b3f4ddae-b100-4591-908f-b415ba4e28df/marbury_v_madison_case_brief_summary.pdfIn PDF document text
    • https://a9750898-a066-404d-a796-54a2f5ad13bb.filesusr.com/ugd/60231a_38791b3d402a480da2f2a54fe87d998a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e24e316-737c-4070-b183-5cfe0db56f74/47772497855.pdfIn PDF document text
    • https://4f65703b-d4c0-4c9c-9e30-73c8cc83ec5d.filesusr.com/ugd/54fa57_b75fae0293f14e83af3b6ad246c217fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/718e0947-7403-4098-9b57-f93e03259e9c/avent_sterilizer_how_to_use_microwave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdb20c8a-e8ea-4a17-a8a0-be74a1681919/what_are_the_different_theories_of_plate_tectonics.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_17dbae1bb7b14a6eae00d96718415520.pdf?index=trueIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_4bcc0b12b2714b76848019077f2e6333.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a39ac9-4bab-43e9-b302-59bc613697c7/diccionario_de_filosofia_ferrater_mora_e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07cd13e4-2ae7-4212-a03f-f174f9071828/plant_dichotomous_key_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08cfcf17-b8cb-40e0-b6dd-dee999acd07a/vinifu.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_off0000e87e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87E 5592 bytes
SHA-256: 8b83068f7d84b9f7aa28a75962056ff6eea944a7310cdf534660e368cc7678b0
font_01_sfnt_off0000fb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB74 10212 bytes
SHA-256: ed9cc6937542168d8f971ce40f82c8f9439e1384eff218f10ee9a1128ecc7e0b
font_02_sfnt_off00011e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E83 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c