Malicious PDF — malware analysis report

Static analysis result for SHA-256 9243f297d1e43ec8…

MALICIOUS

PDF

79.5 KB Created: 2021-05-12 13:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f647bcf40ef6b255bc6259b2d9fb62f1 SHA-1: 24e788dca4ede9b2a97eedaa8252714f2b4dff2e SHA-256: 9243f297d1e43ec87a1096f5db456ba0722c6174c21346391bd9a5c9b800a7f3
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing/trojan content. The document body, though heavily obfuscated, appears to be a lure related to a 'Ferrari testarossa interior', likely intended to drive traffic to the malicious URL found in the heuristics. The presence of embedded URLs and the link farm heuristic strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=ferrari+testarossa+interior PDF link annotation
    • http://ganitigusawev.mygamesonline.org/the_standard_hotel_miami_fl.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/88977416361.pdfIn PDF document text
    • http://kivafijap.mywebcommunity.org/zituparomuxubipomaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/digipexula/esnhdgc/48864632414.pdfIn PDF document text
    • http://sifuzifixezija.medianewsonline.com/participatory_approaches_to_environmental_management.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/46565850553.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/bkjaJij/givolixomefa.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/buxikubovubizaxozamipoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/WiakkOu/bedimenojeweno.pdfIn PDF document text
    • https://cdn.sqhk.co/jobasalem/bP6bOz0/duguxedetuvew.pdfIn PDF document text
    • https://cdn.sqhk.co/kagofiwavum/nq3K3JV/pezuno.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/56247118015.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/ed5665e4-abdb-4bd7-81fc-140c144c710f/excel_vba_convert_range_value_to_string.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/44045636836.pdfIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_099975ed03824dfcbcab4b28706538ee.pdf?index=trueIn PDF document text
    • http://fejonaxi.myartsonline.com/children_s_apperception_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a112462-38a4-46c6-b3d9-8ead40bfb4eb/set_for_life_scott_trench_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/photoshop_manipulation_tutorials_2020.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/agrometeorologia_murphy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b6a97c-251a-4297-ab05-247e9df83846/80400942542.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/pofatupupuwunobemopu.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/52382228886.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/34876454773.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_11201842e77e4c589ec2dbdf3e7ca477.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/963c557a-5d4d-4587-b976-ea1a65533070/dd_players_companion.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_8aac588714734e839b551bb7415d5dab.pdf?index=trueIn 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_off0000fba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA0 4600 bytes
SHA-256: 1984e065e3112d0bb9174be0f7ad45191443ba06b7d3be9cb5327b4045b39745
font_01_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 10848 bytes
SHA-256: 2937a64d629cf650e4b430d19ced9e089222637d9f10f7b0a2b5e6c3be0a4795