Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0a64fb9e97df52…

MALICIOUS

PDF

93.7 KB Created: 2021-02-23 09:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b365e19e9b9642d3e51eb21c03101eab SHA-1: 79743a7287b9b0086fa846519c07b817ca6b67dc SHA-256: 7c0a64fb9e97df52b0218a631c9c27ea0098118ef468a76aed4fb6f61d17d944
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely attempting to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=us+history+timeline+1900s PDF link annotation
    • http://manaluw.iblogger.org/79840140137.pdfIn PDF document text
    • https://jifimarug.weebly.com/uploads/1/3/5/3/135319291/bivevetopepupo.pdfIn PDF document text
    • http://nuzidixiwetor.22web.org/rimuzexududuzuvaxigevavun.pdfIn PDF document text
    • http://discout.online/good_true_story_football_moviesdand9.pdfIn PDF document text
    • http://tranquils.space/viwapofonazof69jlc.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/MhcgfJZ/shooters_world_provides_new_load_data.pdfIn PDF document text
    • http://sexedate69.site/game_of_thrones_book_read_onliner57r4.pdfIn PDF document text
    • http://winoraama.space/top_100_horror_movies_posterwey9d.pdfIn PDF document text
    • https://jutovadisew.weebly.com/uploads/1/3/4/7/134720627/2341691.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/eGihQ2O/dolotewifajubaduga.pdfIn PDF document text
    • https://koropiliful.weebly.com/uploads/1/3/0/7/130740252/sifuf-bivudevaza.pdfIn PDF document text
    • https://cdn.sqhk.co/tilamasepi/gcibGgc/gravity_rider_zero_game_download.pdfIn PDF document text
    • https://fidojosamesevuf.weebly.com/uploads/1/3/4/5/134594598/8be88572d.pdfIn PDF document text
    • http://tasunixupowife.66ghz.com/cdr_stock_information.pdfIn PDF document text
    • http://buloshnaya.site/how_to_use_time_management_in_the_workplaceky82w.pdfIn PDF document text
    • https://wowevabesal.weebly.com/uploads/1/3/5/3/135322278/72d6166a6e59552.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/ggc9jfH/88780472981.pdfIn PDF document text
    • https://kunolutupevuj.weebly.com/uploads/1/3/4/7/134772201/20a0867.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://durunorutap.epizy.com/85235113092.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_off000131ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 5156 bytes
SHA-256: 2f3977b4bab1ba14dfdc20fa05ea3a1577343c6c9e6f87df65e52f1b479e4019
font_01_sfnt_off0001435e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435E 11236 bytes
SHA-256: 26624b8a3670dea0d1fe4b9bbd9f37c7ffd41c725d1cfe416bcb7fc80b2055bf

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