Malicious PDF — malware analysis report

Static analysis result for SHA-256 276a61b9b66b0f86…

MALICIOUS

PDF

70.0 KB Created: 2021-05-13 23:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cde70cea3dd195c330310435e329e229 SHA-1: d7dbcabddcc89b36db9b4a3449964f3f5d6c0185 SHA-256: 276a61b9b66b0f8669938efd40b05d2fd8155ef5b3d663c6177c11a9fb6a91ce
96 Risk Score

Malware Insights

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

The PDF contains embedded URLs that lead to other PDFs hosted on compromised websites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing purposes. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789ae8db5e5---lowexatixekarogonomewuzu.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160735da3b9656---ludesotiremipekuvib.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16086184e41664---pamovavarewozuvovilo.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608441267f4eb---49253917862.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/b39ca7a21f8b24a85cc4914999c75544/badakegiropuvegojaku.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1562a7861---54039446828.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e11e64332---tezatusidomuzegumolomu.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/77ec2989543acd31aabeefcc1f2767d2/xosugufafinasiveziv.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837fc87623f---43289432514.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/9cc4642db81419b5cc3ddf78a5d70a77/vikivetiro.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4b050a555298f21095c386ec595aa040/nemevaxa.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/9501ecc6afa0b46a8b37a7b6b9ce2a3f/90555430937.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/f1dd13d41d6f111d66ac594aec28e518/27738418765.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160910146eaccb---kuraxavidelufamanon.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e85e25818---21490161531.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5bf754036---mijafoxupapaxib.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608bee8735581---vekunufotatikamegavufowu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=lease+cancellation+letter+template
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c3.bin
f2cfcbdba42efa6a9dd7643a9c726cdbeb48f9740b79379dc887d4b748549f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C3 5020 bytes
font_01_sfnt_off0000e6be.bin
0b9f960758691c80411494ba1d0fcd0fa1222dbda1cf9e86dba0b2a846eee52d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 10732 bytes

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