Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e597c26e06a1e87…

MALICIOUS

PDF

66.6 KB Created: 2020-11-11 19:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 09adf5e9c3d5f5910deb624ec4c165d2 SHA-1: 714590f22a96d723f506fe7e1db729144feb5a97 SHA-256: 8e597c26e06a1e87b0c93f4ce1ce2f089d1da9471583fa7a17f5e2a08dc49d44
162 Risk Score

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 'ggtraff.ru'. This URL is presented as a download for Samsung printer software, indicating a phishing or social engineering lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=samsung+clx+3185+software In PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/xaludurowodesu.pdfIn PDF document text
    • https://kokejegifuro.weebly.com/uploads/1/3/4/4/134477846/mepefevutoz.pdfIn PDF document text
    • https://wirukibit.weebly.com/uploads/1/3/0/9/130969322/ab41c2164c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/201482b0-8f49-4227-878e-d5425dc7739a/92541054956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a599f3-5da3-484c-a502-63aeb1670820/ginom.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/83258580586.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/mpsc_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/dowiruribanewos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3905cb55-e0f2-4647-8143-49c7dc65b7e6/balubulofowefun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f83a099f-0b47-4651-90c6-01cc84b98f84/58ba080_carrier_furnace_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/jidiwalonikuxuposewutav.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/meaning_of_substance_abuse.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_off0000c322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC322 6000 bytes
SHA-256: f7976c01bbe5f43b61696795dd3be436a3dc2c72759bbb6ee44cb52af631bcf2
font_01_sfnt_off0000d796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD796 11488 bytes
SHA-256: 435f68dadce5b93eb674f29ba38023056684dba883defab0f00fd0cac3339dc8

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