Malicious PDF — malware analysis report

Static analysis result for SHA-256 22c9261b5c317ce6…

MALICIOUS

PDF

66.8 KB Created: 2021-02-16 05:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1be88efdf127b98da4004bc22b2ab350 SHA-1: efa867732716b439b058e4c6b4f9158c06db90ca SHA-256: 22c9261b5c317ce6474eac0de8b6b6bf8b16c7494fba5aa5429f02f782b5e609
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://bologen.ru/wix?keyword=lego+mindstorm+programming+manual PDF link annotation
    • http://hookup153.fun/botamunumijakogofipike78sr3.pdfIn PDF document text
    • http://dutov.org/guide_dogs_for_the_blind_charity_donationsgcgdh.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/4963062.pdfIn PDF document text
    • http://glasshookahcatering.com/slices_pizza_pizza_slices_gamesgshlt.pdfIn PDF document text
    • http://repovor.22web.org/rafenujuf.pdfIn PDF document text
    • http://wiwuwanulujero.iblogger.org/70353435205.pdfIn PDF document text
    • http://potolkilife.ru/short_vowel_sounds_worksheets_for_grade_50cx2b.pdfIn PDF document text
    • http://eagleaff.com/dadupafopusarulfk9sb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rimamosapike.epizy.com/berliner_platz_3_intensivtrainer.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/vudamevumiji.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/sh_digraph_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/twitch_streaming_guide_bitrate.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/what_is_meant_by_social_constructionist.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/26700343209.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/ateneo_de_manila_online_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/lewewogekibule.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/wubev.pdfIn PDF document text
    • http://konewumabujak.rf.gd/bahubali_2_tamil_dubbed_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/fepimago.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_off0000c949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC949 5220 bytes
SHA-256: 5b1d00d49fd5785445f8f7f5e2f7ab299cc614dc7825c7bacfb21d56b14cd31e
font_01_sfnt_off0000daf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF5 10252 bytes
SHA-256: 8b2d1f8df156937c16192f7d5819309cd9e6e6dd9d05501c530a50203be5c9ce