Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae1248c776ce7ca…

MALICIOUS

PDF

67.2 KB Created: 2021-03-30 00:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1dc6d2c173f6ca410a14c89ea6189c21 SHA-1: b31374d56981af784efc66ea4f31ddcce20b3921 SHA-256: 9ae1248c776ce7ca0dd97e657746517bec4fa67ecec266b7431d0dd6e96f96ec
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, strongly indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for further exploitation.

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://midufefew.ru/award?keyword=blessed+assurance+elevation+worship+pdf PDF link annotation
    • http://pushbiz.fun/k5_learning_reading_comprehension_worksheets_third_gradeiips5.pdfIn PDF document text
    • http://xufikefizot.sportsontheweb.net/incarcerating_the_crisis.pdfIn PDF document text
    • http://idealica-official-it.website/sling_drift_unblocked_76cw9y1.pdfIn PDF document text
    • http://outputqwvk.space/what_is_an_example_of_a_plural_possessivelhy2t.pdfIn PDF document text
    • http://vebifitapex.mypressonline.com/nobody_casting_crowns_sheet_music.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/77929752478.pdfIn PDF document text
    • https://nuzunovi.weebly.com/uploads/1/3/5/3/135314570/dozadatiluzemuko.pdfIn PDF document text
    • http://digovin.getenjoyment.net/50672029097.pdfIn PDF document text
    • http://siteznakomstv69.space/quotes_on_supernatural_powers0akly.pdfIn PDF document text
    • http://docita.fun/mercruiser_5.0_engine_rebuild_kit2c7d7.pdfIn PDF document text
    • http://moymagazin.xyz/80438155168qtg6g.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/absceso_hepatico_etiologia.pdfIn PDF document text
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/lununatonulafe_xixul_godasowezifimoj_dexuxumiriwo.pdfIn PDF document text
    • https://fewurigog.weebly.com/uploads/1/3/0/9/130969621/5423321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a6f578-6848-440b-bb1c-f1d45a383d23/how_much_is_a_first_class_usps_stamp.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_b430958aabba49669225601425ec4947.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a456e9-8287-4230-9b48-bc84504dbd6a/why_does_my_jbl_flip_3_keep_turning_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c16819b2-1035-4bfd-a2c0-b6ad65241063/jejufefuda.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_2b31270649814073b6b4982592eaef1b.pdf?index=trueIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_f169cdab57174f6a84e618e08f219603.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_off0000ca53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA53 5444 bytes
SHA-256: f372c32174ee273bee65f29b5e1d87bf908865312316134cd609e99f9c49d89f
font_01_sfnt_off0000dcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEC 10144 bytes
SHA-256: 114920ef2a270a3125d31bd8993029db3dda9ccafb95cacb3669dda573039159

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