Malicious PDF — malware analysis report

Static analysis result for SHA-256 7772f2ebd5acf9b0…

MALICIOUS

PDF

71.3 KB Created: 2020-11-23 15:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b733a9086a872424cc8e3cae91e8c087 SHA-1: d8d9ca7aa1bc94689a64d98e89cb55ee5007c405 SHA-256: 7772f2ebd5acf9b08a9bdba86d52c079906c2035565c7ff46b3f3af93e4fa8e4
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=c+value+paradox+example PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415951/normal_5fa778bc39a47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f887610af535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f871d652d459.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5faa1ce7ebad5.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://s3.amazonaws.com/wenobagupexekap/sure_yaseen_only_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/41717679052.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3772396-ac70-4293-8f5e-b85c02a30904/examples_of_poster_ad.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/quizlet_duplicate_set.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/bounty_hunter_quick_silver_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/63427885147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c9f8db-71f6-4c06-bfe6-7f9cac80e4d2/72138169980.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/android_sync_outlook_calendar_only.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/raised_bump_on_top_of_foot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d37e5627-bb00-4d91-84ff-9cdf2f075ca9/gerozobewelapubuvaz.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_off0000cd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD54 4728 bytes
SHA-256: 8dea7fd05cd63dc62ae7d64c9c2d0153f55cf6bdc852a89e6c20fdd93e132a6a
font_01_sfnt_off0000dd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD72 10876 bytes
SHA-256: b2ec10eab72b319e230d1f8ba611991aedec7fc0bdb1ea22837d2cdaf7c3318e
font_02_sfnt_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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