Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1a9a1e97f161e9…

MALICIOUS

PDF

80.6 KB Created: 2021-04-09 03:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4e0c2dc616f7947a555879d8e8669094 SHA-1: c283e92c141c715004c704e9757fa1c318c9f916 SHA-256: 7c1a9a1e97f161e98e60fb1bc353731a1d8e11e231ae771691507afda2490235
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body contains a deceptive title and embedded URLs point to suspicious domains, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of external URIs and link farm heuristics indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=why+does+my+id+say+not+for+real+id+purposes+nj PDF link annotation
    • http://rinujajija.getenjoyment.net/79100314673.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/79247776831.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/diruzowixarepoguv.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/wefenirirozujupujovepolur.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/tafsir_al_quran_dalam_bahasa_melayu.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/81890129261.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/bmp_to_merge.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/gabesexomawopaxabux.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/carcinoma_epidermoide_de_boca.pdfIn PDF document text
    • http://siparuzavikowut.iblogger.org/business_letter_writing_books_free_download.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/36561119497.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/naming_branched_alkanes.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/16998613731.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/51689681290.pdfIn PDF document text
    • http://xikofav.iblogger.org/39489733557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijuvewoduga.onlinewebshop.net/boveputovezopulor.pdfIn PDF document text
    • http://nifusotajezunur.atwebpages.com/vulabujoroko.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/how_do_i_change_the_number_of_rings_on_my_answering_machine.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/wokugoradun.pdfIn PDF document text
    • http://nadoxomamepaf.epizy.com/susanosadorozopopuvu.pdfIn PDF document text
    • http://tipakixulo.rf.gd/aambala_movie_songs_masstamilan.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/gimiridavofozonirid.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/tokizoxarikagukomipaweb.pdfIn PDF document text
    • http://guxejusoselota.myartsonline.com/trastornos_de_ansiedad_en_nios_y_adolescentes.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD75 5472 bytes
SHA-256: 6106bed800af53dfaed6a8f232be5614369c45211c3b7bf450a4eb8181bfc331
font_01_sfnt_off00010fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFF 10736 bytes
SHA-256: e6ed61f4a668692ac3a9d0855a634bc4a8188963c4cd1a56f03a689dbcb42c33

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