Malicious PDF — malware analysis report

Static analysis result for SHA-256 481c162de4b52094…

MALICIOUS

PDF

78.8 KB Created: 2021-01-05 21:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d2194b943f94119f71a8035d03234219 SHA-1: 6e8afcdcf79ae137cf8f212e79655267e0971336 SHA-256: 481c162de4b5209467c697c65edcf13c39138cff78ba0e88d81c4951ba64de2a
94 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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=acupressure+points+for+weight+loss+pdf In PDF document text
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/selovopevapetumi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475203/normal_5fcfa92cc550d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428052/normal_5fc3cb73b61ec.pdfIn PDF document text
    • https://jinobodusere.weebly.com/uploads/1/3/4/7/134722577/wawadapowakok_lasik_kiker_sifebuxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5f89f7fdee533.pdfIn PDF document text
    • https://sorolaxubamabu.weebly.com/uploads/1/3/0/7/130739744/3327092.pdfIn PDF document text
    • https://jitipukojid.weebly.com/uploads/1/3/4/7/134707402/566bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370528/normal_5fc613152b411.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/towakog/subawawuma.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/online_photo_booth_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/36169791861.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_off0000eb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB66 5168 bytes
SHA-256: 75bb4fc236ef979f1ab665dea630d16002621ce078873e84f0c0a7a99375d0f0
font_01_sfnt_off0000fd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD08 10164 bytes
SHA-256: 3e7b652df0410a0794161bf84c0534a4944cd8e9dffd058144535b83c9621bfd
font_02_sfnt_off00011fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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