Malicious PDF — malware analysis report

Static analysis result for SHA-256 507fba08d30497df…

MALICIOUS

PDF

90.2 KB Created: 2021-03-29 11:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d5ceb9b2aaf524aec63e281149d4f693 SHA-1: 07afe482a9f4ca05b4c6cffddf55388b9cb77fe3 SHA-256: 507fba08d30497df805433bdfbca1baf712b0be29df91e4fa61744710604e927
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing operation. The primary URL, https://maypoin.ru/award?keyword=rte+mp+admission+form+pdf, is likely the intended destination for the user, disguised as an admission form.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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://maypoin.ru/award?keyword=rte+mp+admission+form+pdf PDF link annotation
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/jivamulokunoturosuw.pdfIn PDF document text
    • http://watogoda.mypressonline.com/87960939529.pdfIn PDF document text
    • https://xinusikavafomi.weebly.com/uploads/1/3/4/3/134353784/575158.pdfIn PDF document text
    • http://susozatatesowa.22web.org/what_is_the_lost_continent_in_wings_of_fire.pdfIn PDF document text
    • http://vuzopozakobepe.22web.org/32101775490.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/kewizibesu-nulagurusaxov-pemotugolovizi.pdfIn PDF document text
    • http://melivoxigozige.mypressonline.com/pugimezinuvipufet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://tefetuzuzip.myartsonline.com/how_long_is_the_first_harry_potter_movie_without_credits.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/26607313654.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/what_are_financial_models_in_business.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/galovoresujanalukaru.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/1507489131.pdfIn PDF document text
    • http://melaworogafema.epizy.com/76840420658.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/5980910829.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/alcohol_y_familia.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/total_column_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/jivurejobonow.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/coordinate_grid_worksheets_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/free_proxy_for_android.pdfIn PDF document text
    • http://zokidawovek.rf.gd/business_plan_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/towusinulanatozeroz.pdfIn PDF document text
    • http://vupikefugogulup.epizy.com/15474561904.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/how_to_setup_canon_pixma_mg2522_wireless.pdfIn PDF document text
    • http://tebuwujovu.rf.gd/fokisagusetitosorun.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_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 5160 bytes
SHA-256: e96a4f6dfab7f7d771e9beef33e0dc3c895b48415ead36c06fe03e89e506b060
font_01_sfnt_off00011029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11029 11636 bytes
SHA-256: 5ff806f2cb6b46e3e1fadc1e65bac0f9b63cc7495e78fcf50cc43f81f93495f0
font_02_sfnt_off000137c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C6 11072 bytes
SHA-256: ec1ad960e4ce1ff8fb755847a5058bc3f5f4feb8fc9fbf942318b15f37327d77

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