Malicious PDF — malware analysis report

Static analysis result for SHA-256 357c40cea98ff837…

MALICIOUS

PDF

90.5 KB Created: 2021-01-16 09:09:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fa757e9d17fce5c6f3c3f54e0b6fc48f SHA-1: 121422028c1b2cca19278e29c48821df51e0705c SHA-256: 357c40cea98ff83762779970a890da0b573a002d7f89a2c649dec51b1fa70353
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=rain+tree+flower+definition'. This, combined with the ML classifier and ClamAV detection, strongly indicates a phishing or malware distribution attempt. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=rain+tree+flower+definition In PDF document text
    • https://site-1176004.mozfiles.com/files/1176004/galoraxizuledubixedomiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5fd77aafc80a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486997/normal_5fd7f6ab48be4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409413/normal_5fde2fb244632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fc5d9c31eea2.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/sebogifiwi_bajiloteluzesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5f974cb0d00b5.pdfIn PDF document text
    • https://site-1171523.mozfiles.com/files/1171523/dr__christopher_ewanowski_md_dermatologist.pdfIn PDF document text
    • https://ronukava.weebly.com/uploads/1/3/4/8/134885886/reruvo-negopiwuximav-sepenusobis-zazinoke.pdfIn PDF document text
    • https://matekulelesij.weebly.com/uploads/1/3/4/8/134858821/rimupunalapi-fekiwu-nitizoxeluxi.pdfIn PDF document text
    • https://site-1176337.mozfiles.com/files/1176337/jio_play_store_whatsapp.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/mowedepesen.pdfIn PDF document text
    • https://site-1178683.mozfiles.com/files/1178683/xojuwofodoxatiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/9572366352.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/17887732635.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/crazy_frog_racer_1_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/86671522488.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 4824 bytes
SHA-256: b300ec7029125a404de8666115ab655bd99a63cf6057ab18ea1e52f7abbc8503
font_01_sfnt_off0000f101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF101 3460 bytes
SHA-256: e77a1108d7f1549d7ce9f8623d5bb36fed0588ec42b9610acb9c647a3a63668d
font_02_sfnt_off0000fe30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 3368 bytes
SHA-256: f2653743798e5fec8030e82f1844793ccabb9362c54de8d70ad7325b7eaee3dd
font_03_sfnt_off00010b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B5D 2168 bytes
SHA-256: 6f1fdb1c7c7482880b50f8fe22e38b0caaaa87be515871bdc1151112636cdd16
font_04_sfnt_off000115c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C1 6284 bytes
SHA-256: 44aad6e78569fe0cb699a9490a0afeafcaa5e92ab82c3b9df6612c8dd642b790
font_05_sfnt_off0001263e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263E 12244 bytes
SHA-256: 4199b2b683d927cfd1e75be6755af1c25fe8f9564cfd118a95294e9c8a75527a
font_06_sfnt_off00014d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D75 4196 bytes
SHA-256: 4ccf7c40cfc147ea2edabb2e7d5ad229e02235360011fd002c527264c1345028