Malicious PDF — malware analysis report

Static analysis result for SHA-256 516eda9b6340b8d6…

MALICIOUS

PDF

81.9 KB Created: 2021-04-03 11:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 49495b086d1ddd7fb212a78b9bc10c75 SHA-1: bcc22811a092e991a8e7c252dff56651dd54a538 SHA-256: 516eda9b6340b8d62d0de85bab848c11225de34ae5bc6d9ed25583a0ff7f5c95
166 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, indicating a high likelihood of malicious intent. It contains numerous embedded links, with several pointing to suspicious domains and one specifically flagged as an invisible link lure. The PDF's structure suggests it functions as a link farm, designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://xajibur.ru/aws?utm_term=how+many+calories+in+wendy%2527s+chili+small PDF link annotation
    • http://the-glow.ru/rezogutoooqcs.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/l7gcihE/zowepepudodigiredanijijo.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/ab2CjhQ/vexing_adjective_in_a_sentence.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/6320874.pdfIn PDF document text
    • https://kixusoboli.weebly.com/uploads/1/3/5/3/135394292/7829748.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/Eiihijc/best_ship_simulator_2020_pc.pdfIn PDF document text
    • http://koreanluxe.com/que_tipos_de_sistemas_operativos_existen_en_la_actualidadrpbko.pdfIn PDF document text
    • https://mejidoxele.weebly.com/uploads/1/3/4/3/134320803/5571568.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/budget_2019_highlights_vision_iasx5ihp.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/hfjdcFe/jbl_link_10_amazon_music.pdfIn PDF document text
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/najepezudu.pdfIn PDF document text
    • http://lanufutado.22web.org/chicco_lullaby_playard_sheets.pdfIn PDF document text
    • http://auth02mobility.com/xuxojgfs2h.pdfIn PDF document text
    • https://sunawakajisume.weebly.com/uploads/1/3/4/3/134324988/8428820.pdfIn PDF document text
    • http://jadebey-x.com/buy_coins_with_ebay_gift_card6gb28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dajomilot.atwebpages.com/definisi_bladder_training.pdfIn PDF document text
    • http://mojofukiw.epizy.com/ascii_test_data_format.pdfIn PDF document text
    • http://zelimuperuna.rf.gd/jomepekirimuradu.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/vexuxu.pdfIn PDF document text
    • http://nogobixa.epizy.com/23907790852.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/fukojejipimeposelogarawus.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/10015204157.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/adding_similar_fractions_worksheets.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/31235638473.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/cat_video_song_tamil.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_off0000ff0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0D 5368 bytes
SHA-256: 52f92709ed560654f9a80ae425cd948eee1fade60129c1b05938a6de68b0de81
font_01_sfnt_off00011136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11136 12048 bytes
SHA-256: f26c313d969a60474cded90a90301873a8c32e15f972b55265cfc6f2fdf37b78