Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd31a928e8ead37…

MALICIOUS

PDF

71.4 KB Created: 2021-03-03 20:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 36a0f7109da650a53402e4a4a8b97e6e SHA-1: 53292e48814f859c0b7f74512f3ae3e822f2171c SHA-256: 6cd31a928e8ead37aeb32ec808fa86672d48319f38450e37346b068e758ea711
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/award?keyword=the+hollow+bistro+and+brew+menu PDF link annotation
    • https://gatilesajegume.weebly.com/uploads/1/3/1/0/131070678/8098734.pdfIn PDF document text
    • https://fiwibafufo.weebly.com/uploads/1/3/0/7/130774969/kewexokutexu-fevuwusuto-lumewefavok-tuketiworeg.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/graco_modes_jogger_se_stroller_reviews.pdfIn PDF document text
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/71fe0c5.pdfIn PDF document text
    • https://veguxalefimas.weebly.com/uploads/1/3/1/3/131382166/f5242fcd271eb14.pdfIn PDF document text
    • https://xoredanixeg.weebly.com/uploads/1/3/0/8/130814516/debato.pdfIn PDF document text
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/zaranozudu-nakodafe-jubufeleki.pdfIn PDF document text
    • http://vobarijijagurar.22web.org/41353645777.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/04e476387b601.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zemuzokaba.epizy.com/512552086.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/which_is_better_canon_2000d_or_4000d.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/ethnic_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/56588565699.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/insert_watermark_online.pdfIn PDF document text
    • http://vujipopeb.rf.gd/razor_e200_battery_wont_charge.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_off0000d066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD066 3080 bytes
SHA-256: 0fcef192c95d6fd4d5333de3e5f0a04c8525a73f6e29f4febd37223f58d6e746
font_01_sfnt_off0000db6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6F 5244 bytes
SHA-256: 72c31a5c045926dc0ed7cc3a080f30173c7b7a22d93c20542ad01aa83e22518a
font_02_sfnt_off0000ed21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED21 10264 bytes
SHA-256: cb42c92428e7097be83be6a07242ef2cdf7b48a1308b1e6a69d0f984a173ba54