Malicious PDF — malware analysis report

Static analysis result for SHA-256 972feef40d460d0b…

MALICIOUS

PDF

88.7 KB Created: 2021-05-21 21:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 78e9c590be8cf801b42c037424ef43ee SHA-1: 57d986c5578036fd790dc9f8039596cd8f94e737 SHA-256: 972feef40d460d0b228a59ea92a1b7188484ade5698a1f9412a988f7ae1c567f
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic PDF_SEO_LINK_FARM firing suggests the document is part of a link farm designed to distribute malware or phishing content. The embedded URLs, such as https://xajibur.ru/strik?utm_term=metabolic+typing+diet+book+pdf, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/strik?utm_term=metabolic+typing+diet+book+pdf PDF link annotation
    • https://jurozujuzofu.weebly.com/uploads/1/3/4/8/134875655/6991968.pdfIn PDF document text
    • https://nolaxefipox.weebly.com/uploads/1/3/4/7/134740184/kavogezudoxoseleb.pdfIn PDF document text
    • https://pavafilapaf.weebly.com/uploads/1/3/5/3/135306960/8744545.pdfIn PDF document text
    • https://zenamuvevabun.weebly.com/uploads/1/3/1/4/131453902/8661355.pdfIn PDF document text
    • https://voxisazemiruza.weebly.com/uploads/1/3/1/8/131871554/790fa82b.pdfIn PDF document text
    • https://momiretet.weebly.com/uploads/1/3/5/3/135345559/9434406.pdfIn PDF document text
    • https://marodesama.weebly.com/uploads/1/3/5/3/135349202/vanumivure_jupivovom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/walmart_ps5_release_time_online.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/29505486250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d21426-4cdc-4075-9acd-f7966e00f86f/38862468196.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/king_size_platform_bed_frame_without_headboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8eea3e9-bb83-4345-a5b4-cbaddbe416f3/56604952629.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/sikasiganatafivavalegu.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/moon_river_brewing_company_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/593f6849-1f7f-4cc3-9f88-ade82c05f3bf/95889231879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7adcbb67-d50c-40e2-a3d9-ca66fc247dd3/what_stores_sell_bob_evans_mashed_potatoes.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/centos_6._4_iso_file.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/nisogolajenuna.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/57383648761.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10637 5360 bytes
SHA-256: d72ff7bd2854322489b3f985ebcabb5f2664bfb484f2c1a641c62059bce80949
font_01_sfnt_off000118a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A3 11808 bytes
SHA-256: 092d99d6cbaa1730167ab3432293a54a60ea3711d408fe9064694edce8269416
font_02_sfnt_off00014101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14101 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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