Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92512a804419cc2…

MALICIOUS

PDF

88.8 KB Created: 2021-03-17 09:23:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b8ecc8b317f369b33feea7ef29281902 SHA-1: 956f9c35987af08beb40cd34e2dce40a58c0e017 SHA-256: d92512a804419cc2bad372c57d3bee24828ae52f68bdfb87811583691ee7fee4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO poisoning attempt. The primary URL, https://lozipotod.ru/strik, is likely used for phishing or malware distribution. ClamAV detection as Pdf.Phishing.Trojan further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=sloan+flushmate+m-101-526-f3+cartridge PDF link annotation
    • https://cdn.sqhk.co/mamidusidozu/AgfijCt/luke_bryan_one_margarita_live.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/gdjbjiY/gukoxex.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/96gcFwP/nolagadikodanonoxiveze.pdfIn PDF document text
    • https://jivikusobule.weebly.com/uploads/1/3/5/3/135326696/a54851.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/karikob_tulupoxup_fegepumene.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roworozirad.epizy.com/pogisikonajemux.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_230dc2c776f0412fb70a35f8ae5c2c3b.pdf?index=trueIn PDF document text
    • http://mufigodukusa.epizy.com/crosshatch_mens_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/job_interview_questions_and_answers_accounting.pdfIn PDF document text
    • http://nivugugop.rf.gd/25087755566.pdfIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_ac4730ce08d14b2b8946a50ab7d7b653.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/simujix/75444084722.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/96984760454.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/catia_v6_r2013.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/xifujowevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430f0c23-2083-4862-9358-016d6437ca1e/65629973123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f07907-5ad0-4245-88c3-604c2a08bdcf/what_did_the_mark_of_cain_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/kufebokifelujigujesorowot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5a4cc9-df9a-447d-bdb3-88abe6e423b1/el_amor_en_tiempos_de_colera_film.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B1 6336 bytes
SHA-256: a44089d694ca61688c030693d40d74f1981bde22c688f56756fbe20b81852c8f
font_01_sfnt_off00012c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1D 12444 bytes
SHA-256: 0eb1287313294a3458945f39cd6e5d79f3820c7b3167cfd88c628fd852e83ee3

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