Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14f38feefdb1cf2…

MALICIOUS

PDF

77.7 KB Created: 2021-03-26 05:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fec275358e6b6693738c47dd59a8cd38 SHA-1: 89335bf6cecb69e5b60ccf9236736d04b0ead6a8 SHA-256: c14f38feefdb1cf2e4e01101282f74fde31d576f062931117423be293b6fc401
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/aws?utm_term=itil+service+operation+deutsch+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fd662220ae91.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/wugugopijorurexofawitexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_60311fdc7fff2.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/Yje2hjd/narapezewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_601055ccf3515.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/tosugogejesukimonewogizo.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/hhgdKzS/valentines_love_coloring_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449768/normal_60510c2eaf876.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
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_5a0aa996f3d04fad8ccb82fa3df9aa6f.pdf?index=trueIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_1698c57b428c44318873ddd91ee37bad.pdf?index=trueIn PDF document text
    • https://7fd4abad-31f8-4c52-ae8e-93d0cc7f2af2.filesusr.com/ugd/910e70_d427feb9eb184276b00bd47a0c576956.pdf?index=trueIn PDF document text
    • http://gamelaluwer.myartsonline.com/66162708580.pdfIn PDF document text
    • https://e4fb9bf1-a3d6-4767-9bf2-2a1021e5dc09.filesusr.com/ugd/53cfc7_7f854e7f21bd40d4ad7de69d07967132.pdf?index=trueIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_dba2df2e7fbd4e3299aa7f671a9e0755.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc34dce-ac4b-4d2a-9f55-fb1a19a30fd2/the_juliette_society_plot.pdfIn PDF document text
    • http://rurebafib.onlinewebshop.net/bacterial_pathogenesis_wilson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b217d778-8e31-4390-b61d-731ac38d2c42/the_wire_semicircles_shown_in_the_figure_figure_1_have_radii_a_and_b.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_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 5120 bytes
SHA-256: c74ab645ffdee4b2ef7859591c7df8b5780b4e8385e434df32e0d304ecb227e1
font_01_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 17648 bytes
SHA-256: 6ba907e255786ee0ae5eaeafef6d893df75b9b5202c69995045a34b252dffd4f
font_02_sfnt_off00011b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B94 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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