Malicious PDF — malware analysis report

Static analysis result for SHA-256 f821ad7c3c337558…

MALICIOUS

PDF

74.8 KB Created: 2021-03-16 20:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e3ff0bce663bcd5574c3addfb9739c8a SHA-1: 282f56204ea21ca79b946456f56e45063f75c154 SHA-256: f821ad7c3c3375586c51571b095f9da65d311f88c6f1b409bbda4f406206a778
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though partially corrupted, suggests a lure related to a 'code reader', directing users to a suspicious URL. The presence of numerous links, many on disposable domains, indicates a phishing or malware distribution attempt.

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 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/strik?utm_term=how+to+use+innova+3020+rs+code+reader PDF link annotation
    • http://jesiguvolen.22web.org/ayyappa_songs_free_videos.pdfIn PDF document text
    • http://selectgetc.top/823203165173l8ra.pdfIn PDF document text
    • http://erogan-oficial.site/side_by_side_book_3_chapter_59qjj4.pdfIn PDF document text
    • http://ewop.space/attendo_risposta_in_inglese_formale0sq35.pdfIn PDF document text
    • https://cdn.sqhk.co/bunigenozav/mWMGwao/76097855038.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/mgeDHhg/dunimufulaxinulizewid.pdfIn PDF document text
    • http://deluwotitawugo.iblogger.org/45561251085.pdfIn PDF document text
    • http://latujor.22web.org/ios_background_nsurlsession.pdfIn PDF document text
    • http://vkrowl.com/32022449228pubs3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokagozu.rf.gd/activate_windows_10_pro_for_free_2020.pdfIn PDF document text
    • http://metukobitoro.rf.gd/masterwork_cnc_software.pdfIn PDF document text
    • http://dikedelunok.rf.gd/beer_nutritional_information_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b33d1c3-13c9-4ffa-b944-b57896262a4b/rojajinalu.pdfIn PDF document text
    • http://malinaliwul.epizy.com/vigusowaxisurun.pdfIn PDF document text
    • http://fewajun.epizy.com/verusire.pdfIn PDF document text
    • http://laguzovola.rf.gd/mlindo_bamthathile_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c44e8b-eb89-4d54-b91c-dce249ef2cb7/61630557306.pdfIn PDF document text
    • http://jirataser.rf.gd/physical_science_notes_module_1.pdfIn PDF document text
    • http://zijubeda.rf.gd/king_arthur_brownie_bowl_pan_recipes.pdfIn PDF document text
    • http://dowovefedomo.epizy.com/koruvore.pdfIn PDF document text
    • http://validexa.epizy.com/zavumodekobokimamubepewoj.pdfIn PDF document text
    • http://petalewoxux.rf.gd/lufaredefo.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_off0000e799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE799 5452 bytes
SHA-256: a5cf4e8b8a88e3fb5e3510a586b0a0e6e3f8c2f0f020d20167725592d7ceca30
font_01_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 10448 bytes
SHA-256: 49cb19be2b2e9443dd874a4b227244c97cc10eccdc514668deb92a16a2fe1be5

Open this report in the interactive analyzer, or submit your own file for analysis.