Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff3e1b9d5d80649…

MALICIOUS

PDF

70.7 KB Created: 2020-12-09 11:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 92a6be31e5b36d1ec3acbb94c07eb69b SHA-1: ee4d58f0447cff2b31c12b691af782d01b1b2365 SHA-256: 2ff3e1b9d5d806492b1ee36bc8df95c93d3c54acbc00023c495f7227342a1e41
214 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded links, with at least two pointing to known malicious or unknown redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to redirect users to potentially harmful sites. Although no scripts were extracted, the PDF structure and embedded links suggest a phishing or malware distribution attempt.

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.
  • 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.
  • 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://traffking.ru/aws?utm_term=atomic+number+periodic+table+pdf In PDF document text
    • https://dolojimopa.weebly.com/uploads/1/3/4/8/134887070/gazizanekugolaf-nosemaw-fawilesupa.pdfIn PDF document text
    • https://fikepeti.weebly.com/uploads/1/3/4/4/134489659/1519778.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/dupitidifases.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/xepesamewateli-jamol-xibajuvajiw.pdfIn PDF document text
    • https://xapotitiguwux.weebly.com/uploads/1/3/4/6/134668809/verisojitizelofoku.pdfIn PDF document text
    • https://wizaxonaguwaxi.weebly.com/uploads/1/3/4/3/134306690/d853f00e90bc7.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/rokulugaza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc58fe89955c744b55b026c/t/5fcaae1388885701c6dee5bc/1607118356124/bezexus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc557811c8c7413144f8578/t/5fcc569c0ab5d62febe810cb/1607227037008/scrap_metal_yard_rockdale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe29741-c998-493e-bab5-cbe8ffcc47ff/the_epic_of_gilgamesh_david_ferry.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5504fa13a450bab11a765/t/5fcf88f23fa051062b4b19c2/1607436531056/9251257531.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd131fead99d6e747b38be/1606226720026/mudifawokoji.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d53ff7cf8c75402a95c2/t/5fc6e5aab2fa4660c8c4737e/1606870444539/unblocked_games_earn_to_die_2_exodus_hacked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57727ab79f442f2485e4b/t/5fcdcdd924c49707d340379d/1607323098107/7825690428.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_off0000d92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92A 5252 bytes
SHA-256: 0b086388dd64835938f5b432cf0e84e19ba5e582fbd3cfc84d4a1445dda3e4e6
font_01_sfnt_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 10284 bytes
SHA-256: 87a67deddd459064556a9599d1f2e7558bd28e3bd0ef4e6fa86c2f58dd4cfb4b

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