Malicious PDF — malware analysis report

Static analysis result for SHA-256 48672a53b17943a1…

MALICIOUS

PDF

97.0 KB Created: 2021-04-22 08:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 11ed2b0adf9c10ffd4eeb22426696322 SHA-1: 7bbf8880787645d7369a7c52523a2ade0e0b6c08 SHA-256: 48672a53b17943a1887b0c1f4c60308cbec096eef837e9ffb51275363fe44d1a
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, appears to contain text related to a product review, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/strik?utm_term=braun+7+790cc+review In PDF document text
    • http://christmas-gift.ru/football_manager_handler_2015b3qbs.pdfIn PDF document text
    • http://copyright-rules-help.com/femomxnol0.pdfIn PDF document text
    • http://xazowagef.mypressonline.com/holy_bible_old_testament.pdfIn PDF document text
    • http://gagefiwirimat.medianewsonline.com/kusagotirevusosexiba.pdfIn PDF document text
    • http://lamovingcompany.com/38946737001d1xyd.pdfIn PDF document text
    • http://zoneeuro.pro/1745852682k06fs.pdfIn PDF document text
    • http://tiktokhd.design/69252115193pk8g9.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/muwipufazuvuvi.pdfIn PDF document text
    • http://duplicwcnj.space/10763098024gck7z.pdfIn PDF document text
    • http://kinokaiff.space/377305326184enpt.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/curriculum_vitae_format_in_kenya.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4da44922-6ee1-4515-aed7-54c3d6b51f77.filesusr.com/ugd/243a28_00eea89605764cccba9cc47fefe67fb4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5849c42f-75f6-4897-ba76-49f5484f99c7/what_does_the_saying_under_his_eye_mean.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_6952ae7c20be406ea6e6612c80f0bd84.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a5b330-66c3-4313-85f7-670c526611a4/80249883892.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_ccfbfaaa686c42cbba31c06fa6cad7f2.pdf?index=trueIn PDF document text
    • https://9abff256-b119-4e75-a612-dfc075f5428e.filesusr.com/ugd/c73517_26af6c7d93bc4e6d9a2acb5db658ba93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05989f91-804f-4c9a-8c11-6f5d83f3a0fe/84044509335.pdfIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_fa063b753c2d4aebb7de4632188b5f15.pdf?index=trueIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_321f8261cbe642268c1c51884dfb1c1e.pdf?index=trueIn PDF document text
    • https://cc46d2ba-e7cf-42f8-aa62-b015a0c17ef0.filesusr.com/ugd/d180c3_e41df24c94b64497ab455dca34eb70a1.pdf?index=trueIn 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_off00013da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA0 5164 bytes
SHA-256: 6335f22e611eab11c86153b65f4b66a0518f2cf78c6a84df6fa32297ec7aa169
font_01_sfnt_off00014f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F59 11176 bytes
SHA-256: 5cc7a68b38b8bc188e07b9d7320d0473c8148c33c7981ded87786f2c41b48bb1