Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadca4354087dee6…

MALICIOUS

PDF

81.4 KB Created: 2021-05-08 04:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7b05c35566cfa005f60358a246c46b64 SHA-1: 262a266b622cd041440021e458884ced2bfe8048 SHA-256: eadca4354087dee69a9031d5785dd448589bab1ba646a8399f344777734f0817
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a lure that redirects the user to a phishing URL, likely to trick them into providing sensitive information. The embedded URL is `https://jacksth.ru/strik?utm_term=how+much+does+a+deep+sea+fishing+rod+cost`, which is used in a redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/strik?utm_term=how+much+does+a+deep+sea+fishing+rod+cost PDF link annotation
    • http://clientbluebadge.com/what_is_the_main_difference_between_unix_and_linuxbdcf4.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://rte-ita.fun/gixedavodojw5n5.pdfIn PDF document text
    • http://detonic-ordina.website/golitanisebaxeruvavz1zzs.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/41856800242.pdfIn PDF document text
    • http://vnds-v.website/car_traffic_racing_game_downloadp39i7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tomaxade/formal_suit_quotes.pdfIn PDF document text
    • http://famekuputoda.myartsonline.com/36328990178.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/xigefisapa.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/brobar_boli_song_djpunjab.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/java_64_bit_jre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655b5a11-2c92-4135-aa16-737b9f57ab44/rumipowasezokexapaxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9439898a-ea3a-4633-9c5a-169ac0fe2cc4/giparegekirivowofesupakot.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/archero_cheats_android_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c4199dd-e715-4f2e-b3e4-d82200583b1a/how_to_bypass_hampton_bay_ceiling_fan_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6205b6c2-31eb-4974-aff2-4f92753c695c/bogobi.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/wibowasuloruzikor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859fa088-7ebe-49b8-aaca-2a64f8e6b009/what_are_the_words_to_you_are_my_sunshine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f21c5e-94ed-4998-9fe7-c27658af71f0/construction_company_balance_sheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/frases_el_amor_en_los_tiempos_de_colera.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B7 5472 bytes
SHA-256: 54008950edbba61dcd53d24b7afd4e7042d35bd7c41ca98bb8382e580b2d7ca9
font_01_sfnt_off0001063a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063A 10500 bytes
SHA-256: 005e09f5d20c5f2d03eb72e7927a22a0b822c2be7ea429e8f021d4cb9aa307ba
font_02_sfnt_off00012a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A22 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34