Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06ddfa0ebcf3f24…

MALICIOUS

PDF

86.9 KB Created: 2021-03-29 10:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2b5d20591ac18094f2fcd760719754e9 SHA-1: eea366ed97e766d3e52a6ded35a7488acbed60b6 SHA-256: a06ddfa0ebcf3f240cf22d5ee3b70f260032c66767a1609a8354ea084957bccd
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external links, with one notable URL being https://ponafet.ru/123?utm_term=buggy+barracuda+plans. The presence of embedded JavaScript, though not fully detailed, suggests potential for further malicious actions like redirection or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/123?utm_term=buggy+barracuda+plans PDF link annotation
    • https://pumavamevimi.weebly.com/uploads/1/3/5/3/135391045/vebej.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/nieQhjh/87199695542.pdfIn PDF document text
    • https://cdn.sqhk.co/zebusukef/4GXv4ij/crash_dive_game_download.pdfIn PDF document text
    • http://kinikapiv.22web.org/tonight_from_west_side_story.pdfIn PDF document text
    • http://telitogivel.iblogger.org/comment_runir_plusieurs_en_un_seul_document.pdfIn PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/pibesimifur.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/WctqibT/muzef.pdfIn PDF document text
    • https://rizofuruw.weebly.com/uploads/1/3/0/8/130873790/32d2b1f73.pdfIn PDF document text
    • https://wujuwali.weebly.com/uploads/1/3/5/3/135326068/777559.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/jj8idha/zidak.pdfIn PDF document text
    • https://famereruzune.weebly.com/uploads/1/3/1/6/131637342/db34ea2cea80c1.pdfIn PDF document text
    • https://cdn.sqhk.co/buvovemif/jjagcgf/nujopu.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://uploads.strikinglycdn.com/files/1d747e0c-2505-488a-bb49-0b5363989e82/stack_on_10_gun_safe_for_sale.pdfIn PDF document text
    • http://mabalipa.epizy.com/henry_moore_drawings_the_art_of_seeing_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a49c60-6ad1-49c7-a549-c062efc83084/mivakemekojenisaput.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_2b21448d6a6b484f8bb73224f75887fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac12adf8-1aef-4adb-b182-aa844b38e230/22340069259.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/no_matter_what_i_do_lyrics.pdfIn PDF document text
    • http://lizusesujujes.rf.gd/danganronpa_2_chiaki_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/75132211996.pdfIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_de2e37eff3904198bab1ae29cd2637bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5dfcd2d-43fa-4f61-866f-e93e428ff86b/nobazubotakej.pdfIn PDF document text
    • http://nekedejiwaki.epizy.com/sifuk.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/66092187415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08874e0-fbf9-4429-84b0-b2d5ad8e3631/basic_fantasy_rpg_character_sheet.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_b8b2de1377eb49049182b0567c02b996.pdf?index=trueIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_e55dab96219f4388a22a0c31291e25ea.pdf?index=trueIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_4a5ab8fde9764a64bb61fb6c84612007.pdf?index=trueIn 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_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 5056 bytes
SHA-256: 89989792c20a5b71b4e0e801898ea2a89de2f3ad0e2d512a66c46ac5d58972ef
font_01_sfnt_off00011804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11804 11772 bytes
SHA-256: 408ace427bda4211649fbfafeefe24d005c525dcb52ae37bf93c9853e98ebef3
font_02_sfnt_off00013ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e