Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c38ad873c54717a…

MALICIOUS

PDF

82.5 KB Created: 2021-04-30 21:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9dc1a314d03634949b9a229af9ace859 SHA-1: 227e29a5ef4e4f4a46c810083af3b329ff967e4b SHA-256: 7c38ad873c54717ad860b2c3d5de5474c9e964aeb79a71da2046fcfc876fa30e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The 'SE_CLICKFIX' heuristic indicates social engineering designed to trick users into executing commands, likely to download and execute a second-stage payload from one of the embedded URLs. The document body, though partially garbled, suggests a lure related to connecting a printer, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://xezojetit.ru/strik?utm_term=how+to+connect+canon+scanner+to+computer+wirelessly PDF link annotation
    • http://italy50wow.pro/similarities_of_flowering_and_nonflowering_plants4exf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420245/normal_5fed58241a2a8.pdfIn PDF document text
    • http://zoneeuro.pro/management_information_systems_salary_in_uae1aea2.pdfIn PDF document text
    • http://priz24.site/asus_xonar_d2x_7.18qcdf.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/ihgEFgi/38768999221.pdfIn PDF document text
    • http://mexicotop.xyz/raxukidovuwubimegoetid8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488329/normal_60502af1acb8c.pdfIn PDF document text
    • https://somalinoduka.weebly.com/uploads/1/3/5/3/135392385/muzuwus.pdfIn PDF document text
    • http://vosajizegek.mypressonline.com/ielts_band_9_task_1.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/ableton_free_for_maczfjif.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/from_third_world_to_first_ebook_free_download6v4kf.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Gijjhq7/vepoxonojimugapotap.pdfIn PDF document text
    • http://biweekamnf.com/wexalezaserivukileljpqhg.pdfIn PDF document text
    • http://yourbigdick.space/kafatozezozegajebipzxy0.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/218278.pdfIn PDF document text
    • http://teachost.com/cuisinart_convection_bread_maker_not_workingczbuz.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/una_pulgada_cuadrada_a_centimetros_cuadrados.pdfIn PDF document text
    • http://topcreditcheck.info/pufos7g61o.pdfIn PDF document text
    • https://nutovavodus.weebly.com/uploads/1/3/4/0/134012609/6437841.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/9135280.pdfIn PDF document text
    • https://zojovotonoturur.weebly.com/uploads/1/3/5/3/135348007/5d0486de4.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
    • http://taguloxutenafol.myartsonline.com/sibezutegetaz.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_off0000f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 5116 bytes
SHA-256: 76637c500add3be7c044040eadd55e9e5ab2d10c9c5f4424ac08e1b5a4ebe074
font_01_sfnt_off000107b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B4 11280 bytes
SHA-256: 7ccd3095c771688f2e5f567ed302321eed68ddb8c63dc6f301c69e4a4fd208f8
font_02_sfnt_off00012e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E02 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3