Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9e20ec637669eb…

MALICIOUS

PDF

75.5 KB Created: 2020-11-17 00:34:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cc884bb3a27fd84c7489e7091b760f5f SHA-1: 305e9fe4d64b6e1cb3fcb6b59b39868e93d2d2f7 SHA-256: ea9e20ec637669eb4b7ce5fdc78aa3d09ca1e192bf885af751c30a460e891c59
154 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?utm_term=walther+pk380+review+hickok45'. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=walther+pk380+review+hickok45 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_5fa3928ada282.pdfIn PDF document text
    • https://rixidagetowema.weebly.com/uploads/1/3/4/6/134612143/zudujeguzugilanalatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427504/normal_5fb2e15f0306c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5fa7283502e1e.pdfIn PDF document text
    • https://kemosufasegu.weebly.com/uploads/1/3/4/3/134348140/podokol.pdfIn PDF document text
    • https://kogemujifogez.weebly.com/uploads/1/3/4/3/134344524/varesusalowit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f8b0c00d713a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485576/normal_5fabc45864fba.pdfIn PDF document text
    • https://jusemeki.weebly.com/uploads/1/3/4/5/134506960/jajuvomi.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/xunilukegez/forever_21_uk_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32ba7f1-f115-4832-ad83-9f39a2e3c4de/65851931061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a2b239-a150-4bfc-ad99-6581ad46cd0b/tosikusasaxan.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/xaloxaxedaxumiraviz.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/hype_smart_watch_model_hy-wtch-bt.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/76021327338.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/samsung_gear_fit_1_apk.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_off0000da22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 5464 bytes
SHA-256: fef6fb96764a8ae302d8ab99ddf52cd60ee9196e75fe8900f51087bba0248ccc
font_01_sfnt_off0000ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 11120 bytes
SHA-256: 4e5f7fac7a750590becea4dc27e70e58c6c07116b1c968d9fbd4fc6a885d91b2
font_02_sfnt_off0001129f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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