Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bdb13f8fb9fb75…

MALICIOUS

PDF

76.0 KB Created: 2021-02-13 05:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e51484f0835dc0f255fee0ff8b8c2df1 SHA-1: 2bad331c4586b7aa84b53b4126e49a83ac6d52c5 SHA-256: a6bdb13f8fb9fb7530d787f4cb6d0e8ac34dde714ad4c53011fb932f76dbf16b
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://jottigo.ru/123?utm_term=marvel+select+thanos+action+figure PDF link annotation
    • http://pelobana.66ghz.com/81515018858.pdfIn PDF document text
    • http://reassurez-moi-fr.info/752726681995mci4.pdfIn PDF document text
    • http://24goodstore.site/73230405713cavb2.pdfIn PDF document text
    • http://govnosiakxws.online/netflix_android_apk_4._4._2ijwam.pdfIn PDF document text
    • http://savadaqwe.space/cantos_del_camino_neocatecumenal_2017mtibu.pdfIn PDF document text
    • http://it50save.info/spotlight_room_escape_level_129rfbo.pdfIn PDF document text
    • http://masajsalonunuz.com/vampires_vs_the_bronx_cast_netflixuzlcr.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/24144470191ody6r.pdfIn PDF document text
    • http://realnoe-obshenie.online/love_yourself_highlight_reel_piano_sheet_musicltsh6.pdfIn PDF document text
    • http://hdvideo.design/68857422833spj3w.pdfIn PDF document text
    • http://bamimutekinawaz.22web.org/bangla_song_bestwap._in.pdfIn PDF document text
    • http://itsamorem.com/vepumedawb7unw.pdfIn PDF document text
    • http://cadenalia.com/first_aid_usmle_step_15yzp6.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://kubivakov.epizy.com/android_tv_box_uk_review.pdfIn PDF document text
    • http://kilatigavof.rf.gd/wows_kawachi_guide.pdfIn PDF document text
    • http://sikejafomanama.epizy.com/converter_para_jpg_online_gratis.pdfIn PDF document text
    • http://tefesapebeto.rf.gd/zakefegaraviziroguvos.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/sheet_metal_gauge_in_mm.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_off0000dd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1F 5092 bytes
SHA-256: bd30bf718eacef69ca5d7652c54946b964ef0238b178397276e609a0dd1d2ca7
font_01_sfnt_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 11236 bytes
SHA-256: a3af9d7895700f131d33687baf1f61745fb4cdcbc7c8b05734409573b1284bc9
font_02_sfnt_off000114c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2