Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2853e2a707134f…

MALICIOUS

PDF

73.9 KB Created: 2020-12-09 21:22:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2dada17744ec0202ac2160f340d3a362 SHA-1: 2aeac6e36aa91d5144f2fe51f190b2afebfe846c SHA-256: 5b2853e2a707134f9f8f7b9268700599dede58d6359b2ffefb3106d44ebff85e
154 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 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 0.9997

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://gettraff.ru/123?utm_term=the+sims+3+house+building In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410459/normal_5fbba5f594a31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5f8914829fe47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_5fa1ea5736fbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5f9bccfc6f384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450639/normal_5fce055a872d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5fbee28313c98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc1999f5e8e827d4292cb4b/t/5fc492a8f3de5e49b5f6ec45/1606718122955/the_yellow_wallpaper_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/film_anime_jepang_sedih_sub_indo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06e3970-e2bb-47cc-a1f0-dca39d517314/10883648380.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1619768612547ed61873d/t/5fc371ea145a8629dc1caf0f/1606644206977/51812119.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/bomalozedilerijatewodire.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_off0000d6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EA 4988 bytes
SHA-256: 4c2177ac5cd19e656817987fa265505969affb8cbb7190b5f67d90203e58ef38
font_01_sfnt_off0000e7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AE 10832 bytes
SHA-256: 76fefd3f3d6970475d5b2ffe1288224ca7fddede2a10c8b8456eb9d3718c109f
font_02_sfnt_off00010ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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