Malicious PDF — malware analysis report

Static analysis result for SHA-256 7455c54afd4489ee…

MALICIOUS

PDF

40.9 KB Created: 2020-10-01 14:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2496f8a8a7ed35a159660b6268cc1959 SHA-1: f10298232bfed2596862334f0bdbc6c07248d7c6 SHA-256: 7455c54afd4489ee778366725946c0e54292e0a8133f0b7917ca8e8b21d73044
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect the user to harmful content. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=animation+storyboard+template+pdf In PDF document text
    • http://files.ahimsaveganliving.com/uploads/1/3/0/8/130814492/figegatogore_wisufosozi_gixudawozelaki_felezok.pdfIn PDF document text
    • http://files.wadelightheart.net/uploads/1/3/0/8/130873903/9da5f78661d81.pdfIn PDF document text
    • http://monome.thebagelers.com/uploads/1/3/0/7/130775692/nuduvataworudagupu.pdfIn PDF document text
    • https://site-1039427.mozfiles.com/files/1039427/92775010497.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/5246088039.pdfIn PDF document text
    • https://site-1039175.mozfiles.com/files/1039175/jekojof.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/e2bddb85-7398-4af8-b597-53fbd5de3121/7916291060.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e25f34-3877-435b-b2a7-60698cd88117/61295969923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76edd0d2-4d0e-44d5-b8cd-e7233decf585/gilalajefutuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90545948-3e04-4bb6-8511-46491b372c5a/32197962420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e1b98f-999a-48c7-95f5-4821d407052b/73055733355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25899491-8555-45a4-925f-180f6ca67c3c/73251522419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d15225a-cc84-453d-8710-f0c819c6b25e/lejufotagefafazev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422b73f2-a3f4-48f8-acaf-9b1e83ca7bd0/52835871075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f1c732-504a-4176-962d-675e10126943/bebetajonaka.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_off000061c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C1 5420 bytes
SHA-256: df30ae940fcab1b5175924ca90ba5bebe0f013145fb17148caf74140ae18c361
font_01_sfnt_off00007416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7416 10156 bytes
SHA-256: 82832f2a0b80c4ff10888b49ddefa4ebc99721d09e1a8b5238f003333ed1e164

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