Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfd102bb3058288…

MALICIOUS

PDF

74.1 KB Created: 2021-03-01 23:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d0e9d47871a119755239d6a7c9a6f944 SHA-1: 57ea826a276651a2cef9cac2d70f7acd965a72f8 SHA-256: edfd102bb305828883147a3132a001c7955a998c02bb6ebd8d4503218dcdc8e8
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 0.9997

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://resalured.ru/wix?keyword=dynasty+warriors+8+empires+beginner%2527s+guide PDF link annotation
    • http://ramuwesitavoz.mywebcommunity.org/807_angel_number.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/rca_11_galileo_pro_tablet_review.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/10359108990.pdfIn PDF document text
    • http://putinoid.ru/nasty_gal_student_discount_codeo42o8.pdfIn PDF document text
    • http://italy-small.space/nuwemewusu2lhw3.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/dogowugab.pdfIn PDF document text
    • http://kujamemapevubu.mypressonline.com/physics_in_hindi_2019.pdfIn PDF document text
    • http://gufutaca6.xyz/acura_nsx_performance_partsobm59.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/42214632500.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/hobart_television_guide_tonightgmoil.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/7210076329.pdfIn PDF document text
    • http://mikrotikwizard.com/the_wolf_among_us_traduccion_espanol_pcvna5p.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/ziburubogiwedolusuxifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zebinagapovu.epizy.com/xebexezijowuzafo.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/bipin_chawdang_bihu_song_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/89341863666.pdfIn PDF document text
    • http://wipimemawupola.epizy.com/how_much_is_a_used_stihl_chainsaw_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/98946427388.pdfIn PDF document text
    • http://limizepafut.epizy.com/41133711322.pdfIn PDF document text
    • http://mepenaxuwijun.rf.gd/wabco_automated_manual_transmission.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_off0000e3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CB 5808 bytes
SHA-256: 5dca8fb4c1027ff3dff75087bdb763d7fff719b145c2a8a6c0d47f20671e9a02
font_01_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 10236 bytes
SHA-256: f343b14f26c5767d5803ff15c58f19c87946b428e8a296f5335858df3edbf4df