Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d01ae6a19c98913…

MALICIOUS

PDF

71.5 KB Created: 2020-11-11 15:06:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e3b565c6507a63db4f686b19e374f05c SHA-1: e9d559f992a531b29cb5e3f11f097c2c336e1ade SHA-256: 5d01ae6a19c98913c00cebe0e41b21d8820c43b5b248bf0fba7a415267fc89e4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a phishing or malware distribution attempt. While no scripts were directly extracted, the nature of the links suggests an attempt to lead the user to a malicious site.

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://cctraff.ru/aws?utm_term=kyocera+cadence+verizon+phone+manual In PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/nulalekeribota-zubajonigorekel-muwevomiregapid-kunotawive.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/1875403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5f951a5417a95.pdfIn PDF document text
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/lawofanigivosi_perupitizo_mapelugaruxabes_fiwoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5fa4052891e1b.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/mukut/kaxinores.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/developing_action_research_design.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/jategikimokun.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/pozijaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/oasis_massage_and_spa_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/breadman_bread_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/foodsaver_3240_amazon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC72F 3812 bytes
SHA-256: 9ecb3cb4303769435a0576a9b79a6564502925158a0ad13899d65148e438699e
font_01_sfnt_off0000d4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A6 5316 bytes
SHA-256: 715d509a5cd77a581e4f8971441ee7dadd32afa35aaf9004dc60ce22654b5f74
font_02_sfnt_off0000e6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AC 12676 bytes
SHA-256: be67ec90b2b0963149e4813a1136a2f9f61708326b5ed553fde35ac82c327d6f

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