Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c96389f69e1ba74…

MALICIOUS

PDF

104.2 KB Created: 2021-05-19 19:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b5cdff675ee43d45ecdfe194402be9f2 SHA-1: e2e6e1670f3abebee65e9a37e6b14e8c0f7b9ea2 SHA-256: 1c96389f69e1ba748417c36fd05508f68cda20f437c997cb65bad466b101cb06
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various platforms, indicating a link farm or redirection mechanism. The presence of a critical ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score strongly suggest malicious intent. The embedded URLs likely serve as lures to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9817

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=is+facemoji+keyboard+safe PDF link annotation
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/valabokojisejami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501364/normal_6003a861be4d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490757/normal_5fc67602408f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379233/normal_5fcbbc140ec5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_606cba2817f79.pdfIn PDF document text
    • https://kigodebilak.weebly.com/uploads/1/3/5/2/135297846/nifivevupubuk.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/8101150.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/nadaxaxux_febuxekowavi_musixulifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484999/normal_6017437245d45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406170/normal_5ffa104f8b44b.pdfIn PDF document text
    • https://taxezuwijukiwum.weebly.com/uploads/1/3/1/6/131606901/rogipige_zakiwoxanamegar_sisijap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446647/normal_600253f7c2432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486206/normal_60044ac225197.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465555/normal_5fe296c344ce7.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/3925326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417325/normal_5ff9241df12d0.pdfIn PDF document text
    • https://fuwurobo.weebly.com/uploads/1/3/0/8/130814642/mitesazuvewosi.pdfIn PDF document text
    • https://larigagip.weebly.com/uploads/1/3/4/8/134887586/nemaruduvigitonet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_605285cd467f4.pdfIn PDF document text
    • https://dodaxopaz.weebly.com/uploads/1/3/4/8/134865523/ritomawabeja_rimitej_wofobit.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
    • https://uploads.strikinglycdn.com/files/c662d5ce-76ab-46a0-a22f-79e64bc6d26c/developmentally_appropriate_practice_in_early_childhood_programs_3rd_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5971921-2277-4941-ad8d-5013e6f01c0c/garmin_s60_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbb74c9-df47-4262-a747-b333998f0d2b/sig_sauer_p320_9mm_vs_40.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 7832 bytes
SHA-256: 14d3e68a4956da6c0914d311dbd2975d8533de5e606aba8cec1b2bbc6f1bc066
font_01_sfnt_off00011e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E88 3872 bytes
SHA-256: c0f40200c39fdcf401310c913815a03268caa0444f0998dd8f40f14112ae06a1
font_02_sfnt_off00012c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C85 5452 bytes
SHA-256: 9f9ecfda347fb88c30906f02beb941b24df9e556ad92e4c6b50a797e5c0e0a4f
font_03_sfnt_off00013f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F08 1532 bytes
SHA-256: 5984d7ea84ce52f79bfc72da238a19662e350133a9fd1abaac5d65555fef9c0f
font_04_sfnt_off00014755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14755 2188 bytes
SHA-256: 9347754ef791be6468ad26cc1975cabad600052ef10dcc94959a48c640b71b65
font_05_sfnt_off00015137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15137 11796 bytes
SHA-256: 306ef8e5756cae85b8c93e03df57d030df950955ea73727cf01f89a8f88931af
font_06_sfnt_off000179c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179C2 16228 bytes
SHA-256: 6223edd207305f698bae13f47b5688ca6100f26365bc2f0ad1cb7b787766fa42

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