Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdad875fcad77e0a…

MALICIOUS

PDF

68.5 KB Created: 2020-12-19 10:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 392cd34138e1dadcd0af428941a29992 SHA-1: 179bc3e906fe527fa2a21cbf18ee416b2db999b2 SHA-256: fdad875fcad77e0aa30c6f7bcf243e096596d87b3b541a11138d8370cb1373ca
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive users to malicious infrastructure.

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
  • 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/123?utm_term=mercedes+300d+manual+swap In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_5f973d01b0686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f9160c970e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fa85894d2647.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/8742883.pdfIn PDF document text
    • https://zeleveruki.weebly.com/uploads/1/3/4/8/134898901/1328094.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/zosevid/find_roots_function_matlab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6db42504bb4653ce19d0c/t/5fd6a41613a48350e81cc5f5/1607902230962/34863245642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0914c221-165d-4ace-b4bc-4716d3ce272d/mebaresakamosalogozid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e43353b-834c-4f25-acb7-12e82150c952/7081691295.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf66443485235c86be7648/1606379077752/probability_word_problems_cards_and_dice_worksheet_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4f790f-dfba-4abf-a8da-4f24c3be1846/59174888960.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5957f084698658e7e225e/t/5fd638ed164d0f203c757ab3/1607874797997/tisabizubosozosob.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5cd3c27a199023ad6e49f/t/5fd62592df2f0204c22e8ad1/1607869842732/redaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/jutoxoxitupaguzev.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_off0000cbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 5620 bytes
SHA-256: 742605032f57aaa44270f63bbac85879a198a5c77217f6f02264aa79c0818449
font_01_sfnt_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 10836 bytes
SHA-256: ae114b089d60dcbc23526e2b37128ab01c5cfff6caaee7446c5f218dc7e64607

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