Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0c04e8163bfb32…

MALICIOUS

PDF

87.3 KB Created: 2021-03-14 05:59:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 28fdcb492dd4b2eec72a0b04492db943 SHA-1: 5cbd2c02012cb1a9482eac6b95faf670f5fa893c SHA-256: 9b0c04e8163bfb32a924795c722c7923cc44adeb71457e12a7de4e5f8d0cf65e
156 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 0.9993

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://zajinet.ru/award?keyword=telecharger+l+attrape+coeur+pdf PDF link annotation
    • https://cdn.sqhk.co/gebunemif/RFigzMc/xagebekukufenagigonov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_604b2bd8d39d5.pdfIn PDF document text
    • https://cdn.sqhk.co/revinoxu/hhicia5/electrical_house_wiring_diagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_5fd88834dc029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471081/normal_5fffeef13bef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478667/normal_603a75a1d1d18.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://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_30fc48d4a3324499afeda68a9d176911.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/75948792818.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_2187911906944dbb88438425b8680d38.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/why_was_the_gospel_of_wealth_significance.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/bizokoto.pdfIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_0cb62c558a494ea6a5a27741d8610290.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/wofek.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_3205a451e73347d9b3da7dc7a6e96ca0.pdf?index=trueIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_e15f211296f743d99f55bed9f4cb1e3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/naxudejigilal.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/2293919016.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/99092178520.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/bloody_roar_4_for_android.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CB 4916 bytes
SHA-256: 7a4872018268ffbec8a19bfe4d8aded5bd9d53cb5282787f91198611e2c807fd
font_01_sfnt_off0000f692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF692 2908 bytes
SHA-256: 0c88a5d2903612a022aba54bdbb84c11560bf430597efae7ed2f07845fc714ec
font_02_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 12332 bytes
SHA-256: 4afcfb218af208d202e930720b3b2b5b0a2a6b252e2b5bdf4698756b648ffd44
font_03_sfnt_off00012a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A62 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_04_sfnt_off00013efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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