Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58f2e47b65739f7…

MALICIOUS

PDF

77.4 KB Created: 2021-03-17 21:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5fb0d1086ec415c2463a82ddfa12a1b6 SHA-1: 450f2b5126146ea2e29845509ddec263cfb193df SHA-256: e58f2e47b65739f7e597f1810794535226a7927fb15c9795df2d221935b7261f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable domains and potentially malicious hosting, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://mezovuduw.ru/strik?utm_term=how+to+write+a+summary+for+grade+4 PDF link annotation
    • http://niluxedofodip.22web.org/monster_high_dress_up_games.pdfIn PDF document text
    • http://qunit.space/janusiwifadulewutpxhf3.pdfIn PDF document text
    • http://6gusevshop.space/644834889146cmqg.pdfIn PDF document text
    • http://kamini33.ru/pedro_paramo_wiki_englishbxe3m.pdfIn PDF document text
    • http://sikojomur.22web.org/joderufusoliwagosopax.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/jiiicje/mopususopupapenoj.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/cpkmUig/6671115799.pdfIn PDF document text
    • https://cdn.sqhk.co/xekowodu/4sidhah/87943951990.pdfIn PDF document text
    • http://kdghy.online/precio_de_tablet_acer_iconia_tab_a2003ar1r.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/ahfq1gd/58373645245.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/hhjahbE/mixipiwametikusaxufipu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_24ecd57abff24d1babe8abdf203df441.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/24000d76-d700-4614-90a5-ca42198f0285/al_quran_price_in_bangladesh.pdfIn PDF document text
    • http://panejolaraluka.rf.gd/best_bollywood_movies_free_sites.pdfIn PDF document text
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_225c0d63889a49a9ae834e4a58de3d74.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_6a528bfc86944765ab8b5e0d42cf8b36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66503301-37bf-4b4f-9ee4-591231dee048/76223780399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/822986e6-6553-47ee-b24e-793322108e36/delojogoxigigakawixurizut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c882c64-9a3c-4f9c-afbd-397dc17517e6/mumilaveniferivigabora.pdfIn PDF document text
    • https://2791e1c6-719d-47aa-bdc5-1556df251b63.filesusr.com/ugd/7757c5_4a516f6d0eb34cb09db787982edb4713.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_2b79a28a6a2c4e469d2d1944c4af7b24.pdf?index=trueIn PDF document text
    • http://puzexexaniledow.epizy.com/83732246380.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_6d453182ca8646fe96d3038e5711be0b.pdf?index=trueIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_697bac73292949a2bfca4a3584ade11f.pdf?index=trueIn PDF document text
    • http://gujusul.epizy.com/3216008101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9e9107-c484-4ec0-8909-d6ac2d0796e9/bible_commentary_matthew_15_21-28.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_e90f5fd4c4e04012a506f68ba04340c9.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_off0000f1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CC 5440 bytes
SHA-256: 84d35af9c214d73f81788a9bc1af115b597f1a677ec9178ad82c04b9f59b1fe9
font_01_sfnt_off00010455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10455 10408 bytes
SHA-256: 1a508fb88afdc23f153667964daea49c38e819a8f58cb19ea06773534f4f8916