Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceea682b369c5b0b…

MALICIOUS

PDF

77.0 KB Created: 2021-04-08 04:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 594d5615cdc6e36a3ab6a8d95687ac49 SHA-1: 112c09069dde4b8dd7898d6a53651aa7e2f3e9d1 SHA-256: ceea682b369c5b0b92cacd62a868794d3c4a1dff02c6df7090711e01a11227af
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://nipisod.ru/wix?keyword=record+policial+ecuador+por+internet PDF link annotation
    • http://merishwheelrecords.com/riguxevigikalenb8pdb.pdfIn PDF document text
    • http://1green.space/17757648998hjmp8.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/ifw5hgm/33692370616.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/Jhdgjhd/85112902097.pdfIn PDF document text
    • http://votewimuvuxa.iblogger.org/keveditavexo.pdfIn PDF document text
    • http://bbcua.site/tavizunobasakuw5ljr.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/96221770898.pdfIn PDF document text
    • http://hihikane.space/27645763232gu4rn.pdfIn PDF document text
    • http://abistrans.ru/3118387391083mdm.pdfIn PDF document text
    • https://cdn.sqhk.co/galudubujuwa/fjijZA3/bevafurali.pdfIn PDF document text
    • http://teplotronic.ru/751138974539nm5q.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/18_best_stories_by_edgar_allan_poe.pdfIn PDF document text
    • http://desokore.medianewsonline.com/puraguna.pdfIn PDF document text
    • http://closemaze.com/jojavaxanekonajararavatj8s5h.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
    • http://pakurowomeki.rf.gd/4122014677.pdfIn PDF document text
    • http://pogadimubafixi.rf.gd/irs_publication_523.pdfIn PDF document text
    • http://besuwodusibix.rf.gd/best_reader_app_for_java.pdfIn PDF document text
    • http://wetedezowob.rf.gd/bookkeeping_for_dummies_australia.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 4776 bytes
SHA-256: e592dede34b6946721444a7efa1278799d90120e7d91ec004d5c44426883c9da
font_01_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 11472 bytes
SHA-256: 55ef44b2e8507d0a7beb627a7417e98c9e13cb191ec91d371eafff674cb8facc
font_02_sfnt_off000118c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2