Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af342f1c20edaf2…

MALICIOUS

PDF

308.4 KB Created: 2021-06-01 02:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1518134febe2a348d714a2c88b09cc19 SHA-1: 64265472c219eb85a2c0380c2fa1ca2af4939cdb SHA-256: 2af342f1c20edaf2a2c805492a06fcfa3a8b6288858b3e095e93001629f299a5
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an external URI pointing to 'irlanc.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9660

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://irlanc.ru/pbw?utm_term=reading+and+use+of+english+for+first+%2528fce%2529+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460057/normal_5fe71117d0055.pdfIn PDF document text
    • https://tazizepi.weebly.com/uploads/1/3/4/4/134439401/roxijexulenapuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_60644ff56240c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420924/normal_60648d06b7c4d.pdfIn PDF document text
    • https://gaxiworet.weebly.com/uploads/1/3/1/4/131408942/wibevawazinawulowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_603fae954ef76.pdfIn PDF document text
    • https://wisezoverok.weebly.com/uploads/1/3/4/7/134707123/db4492ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_6007614682bc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_60148f7a45474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417205/normal_5fe54d5649dbb.pdfIn PDF document text
    • https://vedagoxa.weebly.com/uploads/1/3/4/4/134498973/febenibutoxas.pdfIn PDF document text
    • https://wulidinuwiniz.weebly.com/uploads/1/3/5/3/135326152/c7aa3.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/7980965.pdfIn PDF document text
    • https://xuvuluvibes.weebly.com/uploads/1/3/4/4/134494650/wabilofupujikov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477649/normal_6050488535799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_602edc1a18b95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewafebi.pbworks.com/f/9830251006.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/xutiwif.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/f/22628869355.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144422337/how_to_pass_the_bcba_exam.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/usbutil_v1_02_free_download.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
    • 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_off00046fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46FEF 5580 bytes
SHA-256: 13a1b639e9d9eb9be25469ea0965c89d0edd8f2e1f89f2e493b2523d041c36b3
font_01_sfnt_off000482fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x482FB 12564 bytes
SHA-256: 98f256c2b10644ed6c8ce39c944f83790796997e070ee0b74f5248d9398d7e9d
font_02_sfnt_off0004acbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ACBF 16140 bytes
SHA-256: 5bfda07072dd2e1b0df7f1680a75ba616774ec51e1a09c257f000ba239241e1c

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