Malicious PDF — malware analysis report

Static analysis result for SHA-256 240a7da6fef12f8a…

MALICIOUS

PDF

77.9 KB Created: 2020-12-27 07:55:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 65123030871c02eda15d1c356508b897 SHA-1: fe78b45b322fdf8dca3c8f4eb8a1a31c37edfbf3 SHA-256: 240a7da6fef12f8a7d3c5e33effb2fb688316a55af7c077231be342e9b80c20f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO abuse tactic. One of the primary links is to 'trafftec.ru', which is likely an attempt to direct users to a malicious or phishing site. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8919

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://trafftec.ru/strik?utm_term=map+marker+minecraft+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5f912e8bec251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fd1043fe41f1.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/tizedeniluxiz-gefowigujotubu-senunomikale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_5fbb3f6377f90.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/kovolobox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5fd9cf7340c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5fa215d6969e9.pdfIn PDF document text
    • https://kunobozawi.weebly.com/uploads/1/3/1/4/131453145/lijexomapo_rexav.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/jfUhgMg/7436874309.pdfIn PDF document text
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/bobetover.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_5f8c117935a2f.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/fhiWitv/kasozererulo.pdfIn PDF document text
    • https://finijuzado.weebly.com/uploads/1/3/4/4/134444754/ba4b7c922.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 5160 bytes
SHA-256: d232a3da7b37584d1f02de8c4f5ae0835de6bcf5f0f85f0c45a0fce75e1582fe
font_01_sfnt_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 11636 bytes
SHA-256: 5147593d1585cd1ec3ff3a36298ade65a4e8df29aa5096de1c00e13103128edc
font_02_sfnt_off00012390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12390 16064 bytes
SHA-256: 6f41d85279102efce3c4bd26fddb767baf9b68a4f55e239fba9bedc2a2d3b953

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