Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b1330c37155625…

MALICIOUS

PDF

73.2 KB Created: 2021-02-22 12:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 56313f1bf2362f4e3cfbb2c1b7a2254e SHA-1: 5a54c1ae4baec063afa9c4c66d865a9dd7e9ed82 SHA-256: d9b1330c37155625892aff685cd6017b6019eafd4e037c9ee7269b9f457a9bfa
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=pokemon+diamond+emulator+unblocked PDF link annotation
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/ec47e390f3.pdfIn PDF document text
    • http://islemleriniz.org/52706279399stoek.pdfIn PDF document text
    • https://zukafetovozod.weebly.com/uploads/1/3/1/6/131636890/9647dc70572779.pdfIn PDF document text
    • https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/befapig-wisamokut.pdfIn PDF document text
    • http://xinupavob.iblogger.org/binixirejusororup.pdfIn PDF document text
    • https://rorenaziva.weebly.com/uploads/1/3/1/8/131871817/3befcd3323.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/vojapu/windows_10_home_student.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/pojokawuzolerotajafesig.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/the_firm_nas_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/geredomepufib.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/how_to_setup_a_tp-link_wifi_powerline_extender.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/94342139424.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/faxalugazawosisigokuk.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/sight_words_list_for_grade_1.pdfIn PDF document text
    • http://defujusavoxo.rf.gd/glencoe_health_answer_key_chapter_19.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_off0000e3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B3 5112 bytes
SHA-256: 3d131c63caebad990a065b873eb2828fac322eb58f4764cab26c0e76ede56b68
font_01_sfnt_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 10240 bytes
SHA-256: 7aec3ce9802697af89a99f7a45fd8efe01ed0f46de325e17da5914d231d3bdc1