Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd711681c4de325…

MALICIOUS

PDF

73.8 KB Created: 2020-12-10 10:00:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cab4d915a097852804dcd1d48c191383 SHA-1: 6c76bb48408969eb9774f8b4dd2dc8047c8000a6 SHA-256: 5fd711681c4de32544261b6fb478c303754a3a40441dbeef7736440ece3f8e79
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=bronchiolitis+nhs+inform'. ML classification also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, suggesting a phishing or malware delivery attempt.

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
  • 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/aws?utm_term=bronchiolitis+nhs+inform In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450038/normal_5fa7918d2cb07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f8baae3376e7.pdfIn PDF document text
    • https://dutigopomifit.weebly.com/uploads/1/3/4/6/134611267/xopinepoturogud-sekevejapituror-fowuwa-sozirovub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5fbd64c38e257.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/3bd4be3b1a2.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/cb6c5bc9729ba.pdfIn PDF document text
    • https://bibokesoxi.weebly.com/uploads/1/3/4/8/134850131/9271209.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/5fc5c12b92c50b1a1e98b3c9/t/5fc8cb772dd5737571bce46e/1606994808920/tle_heathrow_fl.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd19f24397200107e30343/1606228466139/1335386039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2f8d8d-a4ff-4e44-8dbf-89b6fc8c86ee/crazy_things_in_the_bible_that_are_sins.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd3eaa0d5fd03cbc5b256e/1606237867821/clash_of_clans_air_troops_strategy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0f3464be903ae642cf63/1606225717667/badaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a774136c-1efb-411a-b6e4-dba95f8a871e/subnautica_sea_treader_path.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd5683a-8035-4b02-acf5-7192b8b8d00c/82573447922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9899b60d-7780-45d5-9930-487fe64d07b2/39190183659.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_off0000d879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD879 4632 bytes
SHA-256: 92c81eb3c26e61011c02211ce3a6219e0d5b656ab9602b7ae8d19ea243396560
font_01_sfnt_off0000e7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 10548 bytes
SHA-256: 86c089e3f1ecd8e3a77abd592e29d0932332d65c7ea5cc6d1d55e3d85b92a547
font_02_sfnt_off00010c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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