Malicious PDF — malware analysis report

Static analysis result for SHA-256 960787cb95112b14…

MALICIOUS

PDF

74.7 KB Created: 2021-03-14 10:06:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a73902b207c991dfb76891b90a8f3ec8 SHA-1: 9b284ad362456c24b33201474b9351616ac6e637 SHA-256: 960787cb95112b14d322d542e749b07ffb3c89cafade00c876f7a1535fb7226d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wix?keyword=jellyfish+worksheets+for+preschoolers PDF link annotation
    • https://cdn.sqhk.co/gawagunikuw/iMjiias/5279210917.pdfIn PDF document text
    • http://lizixute.iblogger.org/28411042469.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarimeg/QUVVGjc/85538791287.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwebobit/2X4aqie/49614630325.pdfIn PDF document text
    • https://cdn.sqhk.co/jivonaxadu/gOjajfz/4107027641.pdfIn PDF document text
    • http://rirelavemug.iblogger.org/best_chm_reader_for_android.pdfIn PDF document text
    • http://zozagemidifisep.22web.org/17792593570.pdfIn PDF document text
    • https://cdn.sqhk.co/renosopezare/icmnRUs/nisemelewupikug.pdfIn PDF document text
    • http://nomenowunesazoz.scienceontheweb.net/15092534227.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/xmRjAjh/free_likes_on_tiktok_no_human_verification.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/22392371772.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/jhgx8ja/58352888111.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/idgfKgh/bifitabofub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/boxonusaturef.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/gomenasai_tatu_piano_sheet_music.pdfIn PDF document text
    • http://penabak.epizy.com/zamobojewazimafutegekexid.pdfIn PDF document text
    • http://jamanofubuvi.rf.gd/61858974353.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_c13c5d7e867d4059a82e67691625a4c4.pdf?index=trueIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_93c24c6a914f4871a6020500e7d1a392.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 4820 bytes
SHA-256: 9bf687b92385114ad1e29d7c044aee7661199140e107708d1e769102105ad852
font_01_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 10976 bytes
SHA-256: 73e7007d48a285f78b60022f8473af0f8d0f14a507bd41fa3328c637fce90ef0
font_02_sfnt_off00010f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.