Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8df308fe0fcd94e…

MALICIOUS

PDF

68.5 KB Created: 2021-05-08 14:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1bc6baf200b987307392d618ef5fad56 SHA-1: fd0884c9e12146d89e69100579a49612d7985aef SHA-256: d8df308fe0fcd94eb5052ab92e457f363ac30c574704c7f6a2a4ffb82d66f8cb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of multiple embedded URLs, some pointing to potentially compromised websites, suggests a phishing or malware distribution scheme. The file's structure and the nature of the URLs indicate it is likely part of a spearphishing campaign aiming to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9810

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://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/60d476bfe1c670f87e8eec89327229d1/72555889834.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/61alvq15fvcp8r796hdq8vamk7/80198613959.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/8e3d4a7c1e2c3b7fcafe76592a29fd5e/48665703724.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/93dfdff6395c73d288181b8fcb96522f/93305951299.pdf
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/27671683940.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/1ufuidf511lvtcpjdekp111l33/wimox.pdf
    • https://mmszke.hu/files/file/zezejipo.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/46cc0c64c5d42d779db76a86ba3462c3/zikejobelidu.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd75b1c913---28763485514.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/2ddf0b97adfb23c10e1a90b97586f516/kizopuwiguwatix.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/80aa770660812bd8780e10ea7ec82a24/fusovinake.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/468933034a8c7e681a6fa493102d4715/3809404786.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/2e77f4bc04d368ccd33a2e485f715683/mizuworaketirifodaga.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/bil39ovedveh9e9g3cpe1kmp52/datowafofopemeda.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/9a2af0ada33f12efda2a570c3d333999/57651667541.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ashrae+55+pdf+free
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d96d.bin
52f3fb260e7ea837ff5d5a96ccd3e903c66d32207bea77fd66a08474254afdf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD96D 5212 bytes
font_01_sfnt_off0000eb28.bin
9c9272a0bfacfd79471e93e1a6c168ac610069f3a26f4c4452d7b98afa923416
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB28 10116 bytes