Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a86a8e1025dee5…

MALICIOUS

PDF

63.4 KB Created: 2020-11-21 14:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 02fbba88fe17bb7c3b0726d3b72a803b SHA-1: ed4efd03488e4f4c9390068a0856e643a4d883d0 SHA-256: 02a86a8e1025dee56d3ce9d3e2ef566b5eac668d33e118f691c637e1ac33147b
154 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 critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://traffmen.ru/123?utm_term=operations+with+scientific+notation+answer+key, is the primary indicator of malicious intent, likely leading to a phishing or malware distribution site. No scripts were extracted, but the presence of a malicious URL in a PDF is sufficient to classify it as a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?utm_term=operations+with+scientific+notation+answer+key In PDF document text
    • https://mumevifovamix.weebly.com/uploads/1/3/4/4/134486033/52e946.pdfIn PDF document text
    • https://fovokifijinibe.weebly.com/uploads/1/3/4/5/134582558/meboz_vodaguxowudun.pdfIn PDF document text
    • https://bevevigulamop.weebly.com/uploads/1/3/4/7/134759368/3139069.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/damerirazib/ge_dect_6.0_cordless_phone_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796661aa-0285-4787-8bbf-7650f988ae18/xiliposekobonamizolin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22c7381-491e-47d2-b17d-775acafba741/49276391880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb70d845-dd56-4dd8-8f91-a153aeec7146/676686188.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/scheduled_caste_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b3a584-4580-49ab-b739-5e255a852fae/cinderella_man_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b7b8975-fb5d-4b3c-a9ba-ae85bd3b571a/lerilun.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_off0000ba04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA04 5356 bytes
SHA-256: 2b600d55a81b1a5a318c4be672050f3f62f096499f1c41429a9e1d574418f953
font_01_sfnt_off0000cc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC48 10636 bytes
SHA-256: 44b27862faf121c262217b8f6063f51dc853f88c5d3a575079730e82b329af20

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