Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d547a51c1b325a4…

MALICIOUS

PDF

84.2 KB Created: 2021-03-21 06:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e7c8f57c218c3a8457ea979fd008bfb SHA-1: 994434519062e866de1050c09aab4080d65b4b78 SHA-256: 6d547a51c1b325a4008b318604ff602e47a484d920239c597280cb3b21ae38fa
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high probability of malicious intent. The embedded URL, 'https://jumiwimov.ru/strik?utm_term=carrier+weathermaker+troubleshooting', is likely used to deliver a secondary payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to exploit vulnerabilities or trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=carrier+weathermaker+troubleshooting
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fcc974f0c78d.pdf
    • https://cdn-cms.f-static.net/uploads/4454184/normal_6013120f73ea6.pdf
    • https://cdn-cms.f-static.net/uploads/4368976/normal_602d43e600b92.pdf
    • https://static.s123-cdn-static.com/uploads/4486190/normal_5ffd2068b03e9.pdf
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5ff171c7616d1.pdf
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5fdc6fad843bc.pdf
    • https://cdn-cms.f-static.net/uploads/4367313/normal_60255f29f3e91.pdf
    • https://cdn.sqhk.co/numorolele/haajgip/81611363491.pdf
    • https://cdn-cms.f-static.net/uploads/4487197/normal_600ec0b067fb7.pdf
    • https://cdn.sqhk.co/xuwisagilevi/hfidFge/96401208592.pdf
    • https://cdn.sqhk.co/zeliravepuj/uzjhdia/fox_deportes_en_vivo_online.pdf
    • https://cdn-cms.f-static.net/uploads/4373997/normal_6047a37d26346.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4bc21fd1-5714-4268-80ea-70bd853caea3/7441588846.pdf
    • https://uploads.strikinglycdn.com/files/9482ed83-b68f-4b26-be74-8de3b57e0bab/is_gods_word_the_bible.pdf
    • https://uploads.strikinglycdn.com/files/25039582-0491-4670-8923-65e2837fd49d/quotes_of_the_secret.pdf
    • https://uploads.strikinglycdn.com/files/8754ca2c-64ca-4ee0-b642-f9a245c6d852/java_8_stream_api_list.pdf
    • https://uploads.strikinglycdn.com/files/56028151-dfb5-444c-be1c-9a693abb4c06/73053864901.pdf
    • https://uploads.strikinglycdn.com/files/42fddd79-3f0b-4a7f-99e1-63c333b836d8/why_is_my_electric_oven_not_getting_hot_enough.pdf
    • https://uploads.strikinglycdn.com/files/95a5242e-c283-4fd3-9b51-b177a7ce5252/atls_study_guide_2019.pdf
    • https://uploads.strikinglycdn.com/files/88c65f44-ebb5-45a5-8083-36898c73447e/algebra_lineal_para_que_sirve.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e828.bin
c627bbd8dca3be3d3e9f5bd55e56b5202aa453c7568991b7849f06da5256b217		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 5300 bytes
font_01_sfnt_off0000fa1a.bin
cbecf08675d92adab31552833507e49552c1feec50f1e6e1fea805e14e43d56b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 11228 bytes
font_02_sfnt_off0001207b.bin
9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1207B 16068 bytes
font_03_sfnt_off00013521.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13521 4324 bytes

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