Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d98e0f5c056d22…

MALICIOUS

PDF

77.3 KB Created: 2021-03-23 03:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 49e1bde4d29eb51589f17e9d80dc7fd0 SHA-1: 1db0d7df0aa51c524633812cd90a00a33734a93c SHA-256: 71d98e0f5c056d228ad3aa0edade8ab8769728e7c2480a374aa4826f4e95980d
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the document is designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://nipisod.ru/wix?keyword=little+rock+nine+worksheet+pdf PDF link annotation
    • https://cdn.sqhk.co/sadopore/hd1jgha/19696636250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_6004e4f483738.pdfIn PDF document text
    • http://bupatinewesep.66ghz.com/bulkhead_transformers_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/tefazaturar/hgPjfii/gageminidiketorosix.pdfIn PDF document text
    • https://cdn.sqhk.co/nopusixinid/x6if5kG/free_online_airbrush_photo_editing_no.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392237/normal_5ffabecb3b7e1.pdfIn PDF document text
    • http://dreabling.online/gimezubig07bu8.pdfIn PDF document text
    • http://brumbum2.xyz/844627515455jte.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/bhjdZD2/dekutapifusemozema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380540/normal_5fe39186d9c8a.pdfIn PDF document text
    • http://titatirivizikaw.iblogger.org/pdf_to_word_converter_offline_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/igicY09/79498494574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_5fd62840b054b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varaxijolos.rf.gd/fundamentals_of_thermodynamics_8th_edition_solution_manual_moran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84dd35f-2472-4576-a890-b2681a8c5c3e/the_spectacular_now_2013_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/harsens_island_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/70968634498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e768444-b909-441e-abe6-5fad1252c928/how_to_do_pencil_drawing_techniques.pdfIn PDF document text
    • http://fuvogixus.epizy.com/44750430542.pdfIn PDF document text
    • http://vojitexaruwulo.rf.gd/40699724574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78439003-5308-47b8-b3ef-84a87bcdda4d/traductor_espaol_ingles_para_descargar_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1efebf03-c4ef-4e7c-9e43-09c7a71eca0f/how_to_play_family_card_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3dd790d-ab49-4128-98c3-41bf768dd512/lg_washing_machine_repair_service_center_ahmedabad.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/histology_quiz_epithelial_answers.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_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 5132 bytes
SHA-256: f42b6a4e2a040bb776b42aaf7743838b48728099b400737929dea3d87f57ba04
font_01_sfnt_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 10524 bytes
SHA-256: 7ff0f9c4bac83b8fc68126706b0540ba6c0a749a0b71a91b63212c10ed25538a

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