Malicious PDF — malware analysis report

Static analysis result for SHA-256 6271b338031bfce1…

MALICIOUS

PDF

72.2 KB Created: 2021-03-30 11:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b76aeea969dc5a31aa431911bca4a389 SHA-1: 5b4caf0f0b26d91adf472b281e572c0a400b1bbf SHA-256: 6271b338031bfce1ca637755129685d796ea60e45a8e35404e1bd293f66ca15c
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host numerous external links, with several pointing to potentially malicious or phishing sites. The embedded URL 'https://xezojetit.ru/123?utm_term=negative+tu+command+form+of+venir' further supports this, likely serving as a redirect to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=negative+tu+command+form+of+venir
    • https://taxefijiduru.weebly.com/uploads/1/3/5/3/135311915/3053752.pdf
    • https://cdn.sqhk.co/limizolaxa/gjc86hg/zenonia_5_mega_mod_apk_download.pdf
    • http://tarigutese.mygamesonline.org/bteb_academic_calendar_2020_20.pdf
    • http://gadatoreneperil.mygamesonline.org/tipasupiriw.pdf
    • https://cdn.sqhk.co/zimidenex/cWijdKF/midas_m32_manual_francais.pdf
    • https://zufefofavenubu.weebly.com/uploads/1/3/0/7/130775539/308d4.pdf
    • http://onlinetyz.xyz/52627019373damx9.pdf
    • http://musc-media.xyz/bleacher_report_top_50_nba_free_agents4rxlc.pdf
    • https://cdn.sqhk.co/pulobegefuzi/dMfDgd4/kivitojugumebudaxogaje.pdf
    • http://shopbest.online/petsafe_2_meal_feeder_troubleshootingg5fgg.pdf
    • https://kopaluzakiletal.weebly.com/uploads/1/3/0/7/130739322/mamepazixif.pdf
    • https://cdn.sqhk.co/pupevadojas/fhfPEvT/81013488988.pdf
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/1007653.pdf
    • http://smcjd.com/98444082482xlvg4.pdf
    • http://kersita.space/wozotedasowuwipotunovivo3cf8q.pdf
    • http://kajuzumanaz.sportsontheweb.net/breaking_the_habit_of_being_yourself_meditations.pdf
    • https://cdn.sqhk.co/jomonufo/hijgfzr/loteliladovidubelopofazox.pdf
    • http://tamodemuror.getenjoyment.net/nivozetomekavapipu.pdf
    • https://xonutupusuvulin.weebly.com/uploads/1/3/1/8/131871786/2094200f.pdf
    • https://cdn.sqhk.co/febenapox/LOhcKgg/tezowemumupisizuxa.pdf
    • https://cdn.sqhk.co/wevodapobu/ijQje6c/wyze_camera_setup_issues.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3aa330bf-8d83-4489-888c-e5130cae9a0f/dixie_chopper_silver_eagle_50_inch_blades.pdf
    • https://uploads.strikinglycdn.com/files/fb11eb20-04e3-49f0-a4c9-3f7b6b0c4c23/what_is_jbl_flip_5_eco_edition.pdf
    • https://uploads.strikinglycdn.com/files/81fe5b1a-0510-4e9d-8088-48c9f220f9bb/how_does_salt_and_sugar_affect_yeast.pdf
    • http://gumizaxewa.atwebpages.com/dakilinewot.pdf
    • https://uploads.strikinglycdn.com/files/9b9006b1-74d8-4d26-9df9-7462c7222afa/9425176154.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfd.bin
0f26d3a3dd260deae42c9e6205fe4a3a261ae9cf1e3e781e6d325f9f186e22bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 5160 bytes
font_01_sfnt_off0000ed8a.bin
67d4ccce744fb7242f3f7fe0260ee87557455cac10e4e5b38fd10bdfecc559d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 11512 bytes

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