Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c1ebcc447842b1…

MALICIOUS

PDF

80.5 KB Created: 2021-03-11 18:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 91e1cded11baa134f0324c366f9302dd SHA-1: 27b971c16df20e193e0247214b55a71155ba7627 SHA-256: 27c1ebcc447842b12b152cdf5a1be158de4342754cb47ab6f57bb0f70c5de225
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Narasimha kavacham lyrics in english pdf', suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/award?keyword=narasimha+kavacham+lyrics+in+english+pdf In PDF document text
    • https://cdn.sqhk.co/xaxamipuxum/jKYUTgf/lego_marvel_super_heroes_full_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/Daegi9I/biblical_coloring_books_for_adults.pdfIn PDF document text
    • http://texewofe.22web.org/anhalteweg_formel_sichtweite.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/nanonixewopu.pdfIn PDF document text
    • http://wafagubinumojaz.iblogger.org/radio_shack_pro_94_1000_channel_police_scanner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468253/normal_602f36de142ba.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/cQNjcgc/9461289057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499334/normal_603ea3168a646.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/starbucks_reusable_cup_iced_coffee.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/rijowonapumanolix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://davojuke.epizy.com/lizonuxuwas.pdfIn PDF document text
    • http://rusabefono.rf.gd/misure_cautelari_processo_amministrativo.pdfIn PDF document text
    • http://gugikimu.rf.gd/demafuwewiluxadirod.pdfIn PDF document text
    • http://lofoxos.epizy.com/58624356878.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85F 5364 bytes
SHA-256: c4be5476af98bba680e2f012d66783862cd3423bc078c6d04bd6b200d1c38974
font_01_sfnt_off0000ea7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7A 11904 bytes
SHA-256: cc5314b9b966f1cfb48313fa1995942765066f9b1ded148cb10f6090cd64ab8c
font_02_sfnt_off00010ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFE 16096 bytes
SHA-256: 61761e6c71fdd980502ce8a3a8cbf9590216241eb9eabe72fdf309a1c23cd3c2
font_03_sfnt_off000124c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C7 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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