Malicious PDF — malware analysis report

Static analysis result for SHA-256 575340113e739d8b…

MALICIOUS

PDF

80.0 KB Created: 2021-02-27 06:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 796d93523d2c474fa3e503f560a34a2e SHA-1: 8fcdce84cab21d425c2f936cce48d2d7c9156ba4 SHA-256: 575340113e739d8beb2a7c3072986d25872f79299aa17e9401482c1a06dd2bee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://golowaki.ru/strik?utm_term=adventures+of+huckleberry+finn+sparknotes+chapter+12 PDF link annotation
    • http://shop-kid-toys.online/19101696067mo7iz.pdfIn PDF document text
    • http://top-agent.ru/fixodasuxateximuvozivu1tbdu.pdfIn PDF document text
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/1792467.pdfIn PDF document text
    • http://snail-case.store/23224054353c5ira.pdfIn PDF document text
    • http://idealslimitalia-official.site/gikapamij2a8.pdfIn PDF document text
    • https://dupudebokuvufex.weebly.com/uploads/1/3/2/3/132303235/lesapurut_mugit.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/the_singing_machine_cd_player.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/what_to_wear_to_a_daytime_catholic_wedding.pdfIn PDF document text
    • http://avit0.cc/how_to_replace_blades_on_husqvarna_riding_mowerlfhon.pdfIn PDF document text
    • http://zoosalon.org/rijibokodigesojoteg2buog.pdfIn PDF document text
    • https://juregirezixo.weebly.com/uploads/1/3/4/4/134401856/3226404.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/tevomenil/allison_1000_transmission_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/donimu.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/dionysus_festival_information.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/mediheal_sheet_mask_korea.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/hp_pavilion_dv6_audio_driver_windows_7_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/anomalias_dentarias_en_odontopediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/xadudivupejenexigux.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/puvadijosadowusesodoraxog.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/cooking_steak_in_oven_on_cookie_sheet.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/92609212293.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_off0000fb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB42 5780 bytes
SHA-256: 24399a7b1695429bfaecdb43a6a2f11ca578c4cc407fa501746d440ce4a845a3
font_01_sfnt_off00010ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF1 10228 bytes
SHA-256: 0658874381a8deb3746abbce69d45a7bca34d7fdc123c15d9b65aeba010a6e7d

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