Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcedbafb3fc4e2a7…

MALICIOUS

PDF

84.5 KB Created: 2021-03-22 01:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1cc912978d2127d92d415363abd0aa32 SHA-1: 1625fab342786c579183a5e25d88e98781ba13a0 SHA-256: bcedbafb3fc4e2a755802ae79dbe6a4ba5621309b5226497a1d7cdd67d06a5ae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://jottigo.ru/wix?keyword=garden+warfare+banner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426571/normal_6030261a3572f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_603ec819b9622.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482617/normal_5ff1f46693f3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460682/normal_5fe1e9a1a5ae1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393356/normal_5ff82df4bf07b.pdfIn PDF document text
    • https://cdn.sqhk.co/kuburarimoku/hfjd7ki/brazil_visa_application_form_in_nigeria.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_600e278ca4622.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/id7mAhd/pepabaliredetevede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_6057c2bd201f0.pdfIn PDF document text
    • https://toxejezewigi.weebly.com/uploads/1/3/4/5/134513259/7595824.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_600b6320c6d3f.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/HqjaHjj/rush_truck_center_houston_northwest.pdfIn PDF document text
    • https://ligenoleka.weebly.com/uploads/1/3/4/4/134496601/sepijepa_popefidaxi_paluwewed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_99d8a8fb29a242f9a3d789f894f02bff.pdf?index=trueIn PDF document text
    • https://30fe55a9-f0c7-4aec-9bf5-b9d2225d99a8.filesusr.com/ugd/c4a51e_827a4149adb74f838d0e8afe11e40b0d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1650b6d-6ac1-4c07-b364-4affe0bdca02/review_tai_nghe_qcy_t5.pdfIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_428b43466b5b4e17b869b5444b230e87.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a882268-e223-4bc1-a84a-658c4697c3f0/learning_radiology_recognizing_the_basics_3e_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c671cc76-9383-4550-9b54-18a0626aff30/errore_stampante_hp_photosmart_c3180_senza_cd.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_off0000f27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 3568 bytes
SHA-256: af1762eb0b7f84ffb630f521a560efd1ce0d603b5d3cc50d61217c8694f501c4
font_01_sfnt_off0000ff44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF44 4956 bytes
SHA-256: c86226cc8008a69f61c359ac6eaf1a3b133bf1302da31e449bb20025096b537c
font_02_sfnt_off00011047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11047 21556 bytes
SHA-256: b000c8fd83a72d07162167c9650c794da48f917a7bf362597df04d466d0079ae

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