Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd66d51e8f50f26b…

MALICIOUS

PDF

89.0 KB Created: 2021-03-12 05:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adfe7d4b0707c83c86afb7761e9bd1d2 SHA-1: 53a517c4da27c90879c9781b5793721204bdf412 SHA-256: cd66d51e8f50f26bce2827df83472b9619fce0cabedff7808de983361fd35d25
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious resource, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/wix?keyword=dua+for+exam
    • http://lubenoredeji.mypressonline.com/how_much_does_it_cost_to_replace_a_chromebook_screen.pdf
    • http://samoe-samaya.ru/puppy_party_adoption_certificate_printableebg2j.pdf
    • http://thrivewebs.com/understanding_the_bouguer_anomalyxo6mj.pdf
    • http://olivamebel.com/gekigustyk.pdf
    • http://tk-pobeda.site/zixaloxuwusizawadid94d.pdf
    • http://metoxegid.mygamesonline.org/totusubirabepodese.pdf
    • http://giwitijudaleka.mygamesonline.org/how_to_use_smokey_mountain_weber.pdf
    • http://kudikadip.getenjoyment.net/samumaxakuvadijirugur.pdf
    • http://tactical-jacket-sale.shop/33022259485rctjj.pdf
    • http://bigops.fun/apsley_cherry-garrardz3z71.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nigojelur.epizy.com/bizexuvidekewafela.pdf
    • https://s3.amazonaws.com/voropa/21211257835.pdf
    • https://s3.amazonaws.com/vigevot/5_year_plan_template_word.pdf
    • https://s3.amazonaws.com/bovenotojitowe/4727810390.pdf
    • https://uploads.strikinglycdn.com/files/61e568f7-bde4-42d1-abc0-5003c0cae3b5/car_air_conditioning_leak_repair_cost_uk.pdf
    • http://vazefetapo.rf.gd/10687513097.pdf
    • https://uploads.strikinglycdn.com/files/ac7f5a01-b575-4271-9e9d-ee624d656c2e/apex_le3245m_tv_manual.pdf
    • https://s3.amazonaws.com/forupokisip/32694939159.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001291a.bin
79443a71081c93b62c2a01c6acaad8872fa3d435d27ae97980234dd12ac0560b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1291A 25548 bytes
font_00_sfnt_off0000f43a.bin
cd8a8674fffebab1c8f3ba4532634205f0d7a7c23c913b3980e4a7c39515336d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF43A 4768 bytes
font_01_sfnt_off0001046a.bin
512c2788f479cec85d7ea54f1a926401df633d3a7a90a400bc4d1e19b28af38b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 10672 bytes