Malicious PDF — malware analysis report

Static analysis result for SHA-256 a051c3b70d2746bf…

MALICIOUS

PDF

77.1 KB Created: 2021-03-26 01:59:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fbf1ab2daba4b45896803168de5a5863 SHA-1: 1942ab2c872ec112a51ac5f2168d9ee3750666f4 SHA-256: a051c3b70d2746bf2baebcafba0809215900b79698a7a68c9c6606fb2bd4e800
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 0.9993

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://dafemum.ru/wix?keyword=soccer+goalie+game+unblocked PDF link annotation
    • http://zikevamakag.mygamesonline.org/nojajita.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/bQghge7/soccer_coaching_drills_for_beginners.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/gjjJYgh/the_dear_departed_question_answer.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/1sQdiiP/56741465752.pdfIn PDF document text
    • http://pizuwujigajanen.medianewsonline.com/teori_manusia_sebagai_makhluk_sosial.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/10157413056.pdfIn PDF document text
    • http://filfex.ru/64246774810qa3fr.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/61317899406.pdfIn PDF document text
    • https://cdn.sqhk.co/xiruregexibe/eicih0I/spectacular_spider_man_venom.pdfIn PDF document text
    • http://fb-ig-copyright.com/son_chiraiya_video_song_free_download201r7.pdfIn PDF document text
    • https://cdn.sqhk.co/nivatasob/iijeqDi/apush_period_1_review.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/hcTibNd/car_dealership_tycoon_codes_wiki.pdfIn PDF document text
    • http://perevozka.ru/what_is_narrative_poetry_in_literaturetvno9.pdfIn PDF document text
    • https://cdn.sqhk.co/wanolugago/cXoids5/15770430323.pdfIn PDF document text
    • https://cdn.sqhk.co/novoganug/oeEpOBZ/que_son_enlaces_quimicos.pdfIn PDF document text
    • https://cdn.sqhk.co/dolavalof/iel7jeM/95197200565.pdfIn PDF document text
    • http://vegoletox.medianewsonline.com/46353051282.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/dbs_bank_account_opening_form.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/Kibhhgi/detective_conan_movie_2019_release_dates.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/descargar_comentario_biblico_de_william_macdonald_gratis_en.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/pibajuwi/craftsman_315_garage_door_keypad_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/78673005416.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/nemodepifavesuxa.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_off0000eeba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBA 5388 bytes
SHA-256: f2b350ebd2404d94440a19a1ea6fdfaa29bad480c31cc1a3ee9687beab3e53df
font_01_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 11128 bytes
SHA-256: 4efe3690421cccd1ae046148893789e82e60cbb44f515cee9f08ae55677acff6

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