Malicious PDF — malware analysis report

Static analysis result for SHA-256 112af337c6af07d9…

MALICIOUS

PDF

77.9 KB Created: 2020-11-26 10:40:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6ad744d156b1c186186e4180fd144683 SHA-1: 296ea8ca0b9302d8385f7aa64fc174593291c379 SHA-256: 112af337c6af07d96986e04e4e98edf36759cbecd05ce33c302d7a029e1354ec
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=mickey+mouse+pancakes+near+me In PDF document text
    • https://kafazuvowimi.weebly.com/uploads/1/3/4/7/134705673/xisezubomux_wimulimad_letomifu.pdfIn PDF document text
    • https://jutonigozazizeg.weebly.com/uploads/1/3/4/7/134700746/buzofevefomidiv.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/5b8bf3948c1e.pdfIn PDF document text
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/1467030.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/896334cc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://s3.amazonaws.com/gumagabu/80635466942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927942ed-f28d-43ce-81ed-e6d159322739/84390702822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdcd2ad1-9cc0-492f-8878-a080f0d152f3/star_wars_alphabet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d34fa59-e3b2-4f5a-acd3-9a335d0179e9/the_succulents_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0913669-ae5d-42f5-b747-67647a3811d6/historia_del_mundial_de_futbol.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/jexapipezipafoter.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://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE9 5220 bytes
SHA-256: db7076bbb1da054a82f1319712fa8a8615fbc409a7b838d5f39c7fd72d6c20b6
font_01_sfnt_off0000d0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 21408 bytes
SHA-256: 4984c45d01a4f363f206e4a2756f4c62184cbfa0a3a95c1b9cf169480ebbcdc3
font_02_sfnt_off0000f23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 2124 bytes
SHA-256: e8af316cc73fa590e317052ff8207ac6c913145ea1361180b17f3db618f01a22
font_03_sfnt_off0000fb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB75 10540 bytes
SHA-256: bd57ea42529ec97e2bb81a758d3ec65b73bfdfe6edb3b4497d05caac20429ef9
font_04_sfnt_off00011f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 2744 bytes
SHA-256: 5dc632f0a4de9db24b871cbf65d233048c7eef56d4edda0b2a32a84c077a43d3

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