Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba972f899443e32…

MALICIOUS

PDF

76.7 KB Created: 2021-03-31 09:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ac47ca4354f5446715e14b40bf3bc933 SHA-1: b099906f282b3d1c27b64de09dbc061e590b601b SHA-256: 1ba972f899443e3281367e3ed37f11790e851e126046be30677089d32b3a4e1c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the heuristic identifying it as a link farm on disposable hosting strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=tom+sawyer+diner+paramus+nj PDF link annotation
    • http://worldhold.online/mazigonumitogobp7krx.pdfIn PDF document text
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/2487975.pdfIn PDF document text
    • http://zujuzerawijuk.medianewsonline.com/wofogiwizakixovazese.pdfIn PDF document text
    • https://mojibivod.weebly.com/uploads/1/3/4/4/134490358/tevige_kefuzigetawis_rotuxelakomalus_dilivafuf.pdfIn PDF document text
    • https://damupese.weebly.com/uploads/1/3/4/4/134492451/b2f04f.pdfIn PDF document text
    • http://susurrus.space/web_designer_jobs_in_delhi_janakpurid1dw0.pdfIn PDF document text
    • https://mesupajediruz.weebly.com/uploads/1/3/6/0/136051454/68053.pdfIn PDF document text
    • https://minufagotokuwak.weebly.com/uploads/1/3/4/4/134489045/8039093.pdfIn PDF document text
    • http://santand-es.com/turtle_beach_x42_setup0nhga.pdfIn PDF document text
    • http://zolepop.mypressonline.com/88367860776.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/waltz_for_debby_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vonikolodu.rf.gd/libro_el_astronauta_de_palenque.pdfIn PDF document text
    • http://jonemif.epizy.com/song_never_alone_by_lady_antebellum.pdfIn PDF document text
    • http://getetir.epizy.com/adverb_of_time_worksheet_for_grade_7.pdfIn PDF document text
    • http://zegaruso.rf.gd/godrej_properties_limited_annual_report_2017-_18.pdfIn PDF document text
    • http://dazozelagur.epizy.com/android_calendar_ui_design.pdfIn PDF document text
    • http://tapanowi.epizy.com/avatar_full_hd_movie_filmywap.pdfIn PDF document text
    • http://pukavagepipo.epizy.com/agile_scrum_ebooks_collection.pdfIn PDF document text
    • http://fazegujopazoj.atwebpages.com/amparo_davila_cuentos_reunidos.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA05 5292 bytes
SHA-256: 1e227d8074c743a97e4cb9550ad2ec05f87e0895fbbd71db0be3f17f9919aeea
font_01_sfnt_off0000ec07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC07 10628 bytes
SHA-256: 4ae7c2e9fe8757122db7cb70ef14164fbd4929846b5d00881326d95737e7a1ab
font_02_sfnt_off0001104a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104A 16136 bytes
SHA-256: f0fc65c8010c86d0a786044555d61f9fc3859f88de363b73c48bb99a9f2a2d05

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