Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed67bff6553817a7…

MALICIOUS

PDF

92.0 KB Created: 2021-03-27 10:05:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 82ab7a5ff6952ee08fba401c1b067e91 SHA-1: 509e1e2c3febee306436a93ac80f41a210b37769 SHA-256: ed67bff6553817a748220ce0072435794b54ef85b8992b1fb6895379c3881ef6
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 domains, indicating a link farm designed to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly suggests maliciousness. The primary malicious activity appears to be the distribution of links to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/award?keyword=3d+pencil+sketches+tutorial+pdf PDF link annotation
    • http://romeita.fun/fletcher_building_ltd_annual_report_20165x4mn.pdfIn PDF document text
    • http://natorg.fun/traditional_spinning_top_3d_max1f476.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/265c2b4.pdfIn PDF document text
    • http://rimka.xyz/trafego_marketing_digital_o_que83050.pdfIn PDF document text
    • https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/455f42.pdfIn PDF document text
    • http://english-10.site/11363473507fn3lh.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/jasoxejifoba-noduweruweso-majosifalipip-bebufofov.pdfIn PDF document text
    • https://vapukukoson.weebly.com/uploads/1/3/0/7/130776878/1608687.pdfIn PDF document text
    • http://worldworkbook.com/fofutopiwikoekcx9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_9d96747d9f554184949e75b050a5e5c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b7cb96-9a49-4e02-bdb1-b5f3f2b8fd1f/fofigaxejewivor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff85d1d-bf56-44c4-90cf-8c2c9022a8c0/58232261843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680501b7-57a9-480a-98c9-eab21b11b1b5/buderus_logamax_plus_gb142_parts_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6303c4-f815-453b-a092-937c47ae92f9/insinkerator_garbage_disposal_with_cord_badger_5xp_3_4_hp_continuous_feed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd5feb8-667b-4220-8596-a0bafd72ee82/french_verb_conjugation_chart_apprendre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19327e1e-eb03-4315-94ae-cb4a54faf3c9/how_to_apply_decals_on_plastic_models.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cabfbfc-5cb9-4c6e-aee6-358efc6f6c2a/58691044974.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_5545a3fdd4a24882aae29a094d1496ed.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05621a3-265c-4f30-99d4-0ae425fc35d3/jesumuwebusabowe.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_b0400ff76aaa484db6eee258e113568a.pdf?index=trueIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_f49d5e3830c246af8fcbc76312b6186f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc150ec-ad5e-43fb-8ab9-bbbdee501762/pometisadikesowamebon.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_off00012daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAF 5376 bytes
SHA-256: 2ed984af0acb19edd04f61f881933a6734e4dfe88be0dd36c924e267bd844ed5
font_01_sfnt_off00013ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF0 10240 bytes
SHA-256: 1cccf10eff2dd7826b0d655ca7dd1505b268c2fb0303fafb3f1963f16c0d4512