Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c2220eb45b8050…

MALICIOUS

PDF

68.1 KB Created: 2021-02-21 09:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0c3be2cb6681c71a69a5d85a9da6ebbd SHA-1: 0424d5c9b577d12299869c2cf5403df0f7a40097 SHA-256: 10c2220eb45b805083c7fa68d0630e7c7fe9326ee554e39a622ea74336819f46
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO abuse for malicious purposes. The 'Remote-support tool lure' heuristic indicates the document may instruct users to install or connect to remote support tools, a common tactic for scams. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://seumenha.ru/wb?keyword=kenmore%20665%20dishwasher%20reset PDF link annotation
    • http://ximikilanad.22web.org/pizukaxiridifomavidedeguf.pdfIn PDF document text
    • http://naturaitalia.space/98037046044f1x02.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/b3f44a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5fe83c79cf02a.pdfIn PDF document text
    • http://voyazh-shina.com/90s_dance_music_playlist_download_freehhbyc.pdfIn PDF document text
    • http://fozovozazu.iblogger.org/how_to_get_started_in_songwriting.pdfIn PDF document text
    • http://okrasote.info/kitumgbk7i.pdfIn PDF document text
    • https://dadotetixaj.weebly.com/uploads/1/3/4/4/134404583/kiduliwuwegaxajakoli.pdfIn PDF document text
    • http://begedotupatato.66ghz.com/oracion_para_pedir_el_espiritu_santo.pdfIn PDF document text
    • https://nixawajumumija.weebly.com/uploads/1/3/4/3/134338940/6454392.pdfIn PDF document text
    • https://xizotuvulozig.weebly.com/uploads/1/3/1/8/131856772/5585839.pdfIn PDF document text
    • http://idslim-italia.site/barood_video_song_hdujyw8.pdfIn PDF document text
    • https://fubalaxusagipun.weebly.com/uploads/1/3/4/1/134108832/xaxidarusotu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415291/normal_5ffb6ecc5874a.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/kulinisokakewi/44997090557.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/safabesalixaxoravigojo.pdfIn PDF document text
    • http://muvabeso.epizy.com/kenora_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/anydesk_remote_control_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/destiny_2_pc_starter_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/24341014748.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_off0000ce62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE62 5372 bytes
SHA-256: b89499ad78b4aee5592dfc461090582194a0def855c230bdab6fd794d8c854f3
font_01_sfnt_off0000e097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE097 10136 bytes
SHA-256: bdec286eb8a70be8c02a2bf8a56accdd703cbab58e93b44af6bdd04408a9b191

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