Malicious PDF — malware analysis report

Static analysis result for SHA-256 748f18b2aebc0b41…

MALICIOUS

PDF

75.7 KB Created: 2021-03-16 01:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d804ad94291a4c92f67b24953cfda849 SHA-1: 34f2d18b384b4aea7e2cef3095383541c5827035 SHA-256: 748f18b2aebc0b414aabbc14f46c2fa99a72377e13590c8ab0bb2a08a904f89d
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document is designed to drive traffic to potentially harmful sites. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=final+fantasy+xv+official+guide+pdf In PDF document text
    • https://naxekagaxobu.weebly.com/uploads/1/3/4/4/134477821/4969370.pdfIn PDF document text
    • http://zamakin.iblogger.org/how_to_adjust_belt_tension_on_troy_bilt_horse_tiller.pdfIn PDF document text
    • https://fenatafu.weebly.com/uploads/1/3/1/6/131637570/dutowimuzaj-ruraror-timezow.pdfIn PDF document text
    • https://derifopo.weebly.com/uploads/1/3/4/4/134490925/5208425.pdfIn PDF document text
    • https://kibimibenafozo.weebly.com/uploads/1/3/5/9/135979164/5271216.pdfIn PDF document text
    • https://sabumamopadav.weebly.com/uploads/1/3/5/9/135957329/4053829.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/12658870307.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/bahishti_zewar_english_free.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/metigab.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/texas_dmv_written_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/bengal_tiger_movie_ravi_teja.pdfIn PDF document text
    • http://natexaz.rf.gd/review_written_in_my_own_hearts_blood.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_8b76b8248cc1481fa812424f552f9f4b.pdf?index=trueIn PDF document text
    • http://jonegukum.epizy.com/lufuvujilaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/zesedigojupafaxizom.pdfIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_03e7d43e0c4c4fd0a4a3d5e8a7ab4d33.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1eaca08-cf27-40fe-9f4d-bb802ebcebba/mahatma_gandhi_autobiography_book_review.pdfIn PDF document text
    • http://kivaxabobusited.epizy.com/ventajas_y_desventajas_del_modo_de_produccion_feudal.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/andiamo_a_comandare_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda1c28a-9ae8-4650-9103-2870c77d9bb5/life_events_checklist_scoring.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/mindjet_mindmanager_free_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cdec4d9-63e0-49a2-a541-728a4afcc2ff/xiburiluw.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/zuriva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499072ae-b4ad-422b-ac06-cf7be274cb9a/what_is_lean_startup_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08d8da7-221a-47f8-8371-316ca5df1cf2/how_to_do_vector_addition.pdfIn PDF document text
    • http://tigaxulajaju.epizy.com/norudavojaxexejo.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_off0000e8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 5412 bytes
SHA-256: 7c0f96e7992d5b1e7eb1f1f80e5245b75ccbceead4b83ce5a1120f602cf14b98
font_01_sfnt_off0000fb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB43 11252 bytes
SHA-256: ca86b6975157f57be061c6017084cab37f22f2532dd1532d6a5c4c240d49e2b9