Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a5a1b03bdc9845…

MALICIOUS

PDF

76.0 KB Created: 2021-04-07 23:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 319c22572631fb60e38612bbceba0efb SHA-1: 4aa9e86a6b67626d0f02fb56f662749b575a861d SHA-256: 76a5a1b03bdc98459a80e6564a0f21c5dce36df6b613537c210b451a6a0ba75a
156 Risk Score

Malware Insights

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

The PDF contains a lure related to Microsoft account errors, directing users to a suspicious URL. Heuristics indicate a link farm and ClamAV detection confirms malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/wix?keyword=that+microsoft+account+doesn%2527t+exist.+enter+a+different+account+skype PDF link annotation
    • http://static-get.top/el_hombre_mas_rico_de_babilonia_audiolibro_completo_descargar_gratisx2ybw.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/how_long_does_it_take_to_get_a_driving_test_appointment.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/how_to_use_canon_sx540_hsz5ujr.pdfIn PDF document text
    • http://gamedv.design/52603402958nz1yg.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/lupuferatinirujefif.pdfIn PDF document text
    • http://checkmycredit.info/gogutoxupaxefuvosa5rfuw.pdfIn PDF document text
    • http://rofogukiluvupu.mygamesonline.org/qasida_burda_lyrics_in_arabic.pdfIn PDF document text
    • http://site-shop.xyz/momeji3xut0.pdfIn PDF document text
    • http://mazanatur.space/watertown_mews_1_repton_pl_watertown_ma_02472o2ia7.pdfIn PDF document text
    • http://detonicro.website/adobe_acrobat_10_trial9sx1z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/wagexujupa.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/57785413914.pdfIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_d3cb2a8fd28b43148d7b1f219c2aba37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jotizifime/64639640296.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/32225348912.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/31110495723.pdfIn PDF document text
    • https://8459f3b7-b2e6-4b58-af31-5f29adf293b7.filesusr.com/ugd/a68450_ad7b1344e0744edd8d1b92b4cecc627c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mogipegi/79336118364.pdfIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_aa23b4f5c0cc4ba6897f2aa10622b761.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salade/crossword_quiz_movies_level_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/62975222231.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/viktor_frankl_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/pogobajefalujosudupik.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_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 5612 bytes
SHA-256: 2730a04b4cf05c9dbadc49298105e390067eace036b525787dc13c2dee2c86c7
font_01_sfnt_off0000fdcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCB 10548 bytes
SHA-256: c3ed78b1d8438f09f98b88458cd2efacf3c2dec69bc3913f48c01403e77b3cc8

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