Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c01919fa56c2b59…

MALICIOUS

PDF

105.1 KB Created: 2021-03-15 03:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8fdd42ea9d2e97aa9594f8f6abc32224 SHA-1: 7d6901be3747ffdc3793f13ddd3586933ceacb75 SHA-256: 5c01919fa56c2b599c2ef531280c32548547d0993c57806ca93e35531bd0483d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The presence of a critical heuristic for PDF SEO link farm and ClamAV detection as Pdf.Phishing.Trojan indicates malicious intent. The document body, though heavily obfuscated, contains text related to 'rapidex spoken english book pdf free download', aligning with a lure to attract users to download content, potentially leading to further malicious downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://xezojetit.ru/award?keyword=rapidex+spoken+english+book+pdf+free+download PDF link annotation
    • http://vibijinit.scienceontheweb.net/pimejuvurinikekema.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/23644380310.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/35761949656.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/factory_reset_netgear_router_wndr3700.pdfIn PDF document text
    • http://xupokaxe.medianewsonline.com/95382594925.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/sebagegalafanakaxirur.pdfIn PDF document text
    • http://armlur.space/how_to_fix_google_maps_on_iphone_6t2s7w.pdfIn PDF document text
    • http://doweryklkq.space/board_resolution_format_for_annual_general_meetingdr7uq.pdfIn PDF document text
    • http://redpandarecycling.com/fuzas1dv6g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/bomupi/96527765582.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_5f422f8ea15941ecad4bad700c5d6f07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/dark_souls_2_bosses_ranked_worst_to_best.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/kokasunimizogugekid.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/cartoon_network_battle_crashers_achievement_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/what_is_the_best_genre_of_music_to_study_to.pdfIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_81427f6da61f4b97978b13905ca4cd32.pdf?index=trueIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_31f34b2a69b8461fb7094e53851c0bce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/88369169273.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 5672 bytes
SHA-256: 49854160cf8da12450582e9ba8be615b5b9b1eef4050e1d76e6ad1628ff80dff
font_01_sfnt_off00013a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5D 10704 bytes
SHA-256: 1917806018543f6aacaf1ba4ce4c41fadf20357d5110cf0a6870e2f0574745e5
font_02_sfnt_off00015efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EFE 18504 bytes
SHA-256: b86a30e7daf522f2f9c81b615aae4846641ad84a8b4cb8a398d28e7ba2a22799

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