Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d2b9d13bec72df8…

MALICIOUS

PDF

68.7 KB Created: 2020-12-25 03:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e11cc920e1f167cbf2aa7a516345b86e SHA-1: 2d776f24603e3f3846cc8daefa7bfea3bd137fe6 SHA-256: 7d2b9d13bec72df8e6990526637e8e3a745e00761dd5950204dfc5b6a441fac2
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a malicious redirector and link farm. It contains multiple embedded URLs, with at least one pointing to known malicious infrastructure. The presence of a link farm suggests an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/strik?utm_term=mini+golf+club+game+online In PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/tufofub_zimesawevubima.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/485a8aa2-6ac3-4b16-a89b-d2b1fedd0e26/rubirokiwope.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/sifutaliko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/408dc95d-5ea3-4131-86b9-ad31f8cb44d3/america_a_narrative_history_10th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c987d1a3-b3d1-45eb-8caa-4d5883f9435d/dexodipilifelane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e057877e-5c7d-43e4-b3c5-46839f7690e2/69645935253.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/narajipunizowofimelapam.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/xorefifeselewudovexorub.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/altivar_12_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/rational_numbers_as_decimals_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7005840-5547-4633-8155-f9944cfcfe1f/45675419819.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_off0000d1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BD 5072 bytes
SHA-256: 0f62b7afe190e8faafa911e76df6636b882396cb2c4bfc7bb53a619200b61d50
font_01_sfnt_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 10396 bytes
SHA-256: eeb8aa51fb26ca6cc5bd6eb521d4f801af0cec24ebc187cf7fbc918a88b85465

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