Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aad1fc0105fb999…

MALICIOUS

PDF

90.6 KB Created: 2020-11-19 16:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b4f9dfb1b5520c49bd5fd9d97fb9c511 SHA-1: c4b5c7fad1b708f1010b89e1ae5559d9b2f0917c SHA-256: 4aad1fc0105fb99926941e65e26708147a2f8ccdd3a645fa6d7b3898633fc10b
162 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. It uses an urgency-based lure. 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 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/aws?utm_term=epistaxis+guidelines+uk In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/jobezexoripukeg.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/51817553134.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/mirrors_edge_2d_borne_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf7d645d-694d-4780-b902-eb1f8805923b/kanixusus.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/lifigajixujaromalipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec87088-48f8-4288-b9c5-b36dc0485b9e/guitar_with_w_on_headstock_-_james_taylor.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/free_for_all_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/limemokukaperagij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bb5b42-d60b-4702-bd76-1c75e7d36cc7/96355450009.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/physical_geography_of_sparta.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/kalez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c377376-25d3-44bd-ac01-d026b62f0af3/43999470367.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/6179686741.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/davubasu.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/jafezivek.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/6318687535.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_off00012656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12656 5120 bytes
SHA-256: be7975317a9f8af08769a3d9a3f157f8e7c4a13ed897a9743ddac1301e2ee085
font_01_sfnt_off000137dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DD 11084 bytes
SHA-256: 19d2fc2e80ca77fbad10086ec8eb12aa5eb1a053a5bd24cdd13ca10a1c776457

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