Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe171d50628e257…

MALICIOUS

PDF

74.9 KB Created: 2021-03-23 01:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a6203993abf43071d1ddcaa75acf9d9 SHA-1: 39e4050d44693167d3345605cb5416fd731d41b9 SHA-256: bbe171d50628e2572473df7e28ae2f42036204cdce5037866f8744dc6ce3e572
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'theoretical molar mass of benzoic acid', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wix?keyword=theoretical+molar+mass+of+benzoic+acid
    • https://cdn.sqhk.co/dogilijesiwu/jwhaijS/radio_fm_media_expert.pdf
    • https://cdn-cms.f-static.net/uploads/4411944/normal_60256d92cd07b.pdf
    • https://cdn.sqhk.co/lofesaxudiwo/ijjbAif/samobolilik.pdf
    • https://static.s123-cdn-static.com/uploads/4383308/normal_5ffffb0bd3134.pdf
    • https://cdn-cms.f-static.net/uploads/4374954/normal_60245ab7ab09a.pdf
    • https://cdn.sqhk.co/zokuwagopole/rYjhrjf/forsaken_world_gods_and_demons_mobile.pdf
    • https://static.s123-cdn-static.com/uploads/4447098/normal_6003b4e72ad62.pdf
    • https://cdn-cms.f-static.net/uploads/4426814/normal_600c0168f2593.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1e489702-7dcf-4e05-8a00-9bc7c39ef17a/gopasufemiguxatavovola.pdf
    • http://xobeminal.atwebpages.com/honda_inverter_eu2200i_recall.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/6427662741.pdf
    • https://uploads.strikinglycdn.com/files/e24e9515-ebe3-43d7-b588-e3bd347c4ee5/speed_queen_troubleshooting_codes.pdf
    • https://s3.amazonaws.com/tanikanaw/app_cache_clearing_android.pdf
    • https://uploads.strikinglycdn.com/files/a7aa6ebe-424d-4edd-8f93-689baea89513/jozenitumojumubug.pdf
    • https://s3.amazonaws.com/novifamigot/97619159141.pdf
    • https://s3.amazonaws.com/ximupuv/gre_antonyms_list.pdf
    • http://nemenarubaz.atwebpages.com/cantine_scolaire_en_cte_d_ivoire.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d142.bin
45bdb6990a8332bb1e583fa925d40088e25d16e5abb80e67e249297ae283097b
pdf-font-stream PDF embedded font (sfnt) at offset 0xD142 5400 bytes
font_01_sfnt_off0000e377.bin
6c3caa6f232bd1adc7bc6323f5ad0981ab2afe96970e394e3a2f67c98a9453a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 11024 bytes
font_02_sfnt_off00010937.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10937 16092 bytes