Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2cd744adff1c6c…

MALICIOUS

PDF

77.2 KB Created: 2021-02-25 12:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2b212ef4c6b21a879766351e4cb567ef SHA-1: 863c2b4e72ebd9ae73940dbf9a5bdded44340d34 SHA-256: 5b2cd744adff1c6cf303048dd6b07e0e028e9bcea0a22e6be6ebdf139e6e8f6e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=the+essays+of+warren+buffett+book+depository PDF link annotation
    • http://jojidasusesot.sportsontheweb.net/who_makes_the_best_portable_air_conditioner.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/rugakunapamekirazafoj.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/ilhegc5/91373473053.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_6032cebd5360c.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/rojugidijikibujob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446937/normal_5ffb11b45583c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5fcf80ab530c2.pdfIn PDF document text
    • https://cdn.sqhk.co/sowuwinadapu/4ibhhdy/fitbit_sense_vs_apple_watch.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/accu-chek_aviva_plus_test_strips_coupons.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/gjoifwk/school_of_dragons_codes_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/jbjjCwQ/89904473447.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/7w8Ongj/zunan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/chess_strategy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/nejoxajafawowimofel.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/jasejevezu.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/8183466849.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/purevpn_firefox_extension.pdfIn PDF document text
    • http://duvodix.myartsonline.com/nudizixunagagepumiva.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/fizizawadad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 5444 bytes
SHA-256: 071d28072f9f293a24c5c2c679f44a16245e5fc55068779cd383580508856417
font_01_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 10612 bytes
SHA-256: 825e606d5d0ade1ec49ef4deac461de8c661665ac96e596261be52214919b187

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