Malicious PDF — malware analysis report

Static analysis result for SHA-256 9adce8a1eb2efe96…

MALICIOUS

PDF

84.7 KB Created: 2021-03-03 06:34:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 58c0f300680668d7f5f0c4006614b442 SHA-1: e0ca6f406e30a940fa74b95bcaf8efbea4349c54 SHA-256: 9adce8a1eb2efe96cd65e615ce4afb44ab79c58969441011f766f7ef55df352e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://xajibur.ru/award?keyword=liftmaster+formula+1+lights+not+working PDF link annotation
    • http://goodxday.xyz/book_of_jubilees_in_the_biblekxb59.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/31382695906.pdfIn PDF document text
    • https://vemomomofaj.weebly.com/uploads/1/3/2/7/132740815/kiteviwuwudalovavuj.pdfIn PDF document text
    • http://grandov.pro/jujow7n47e.pdfIn PDF document text
    • http://legiontry.online/14267321524ito7s.pdfIn PDF document text
    • http://skidki-day.site/nespresso_lattissima_plus_delonghiu3vyh.pdfIn PDF document text
    • http://rabota-plus.club/clyde_helms_radiologyfd58r.pdfIn PDF document text
    • http://ledimpress.biz/grammaire_progressive_du_francais_debutantgdyvj.pdfIn PDF document text
    • http://vofufime.mypressonline.com/54134223590.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/25463896143.pdfIn PDF document text
    • http://xixofafil.medianewsonline.com/how_to_test_a_hayward_salt_cell.pdfIn PDF document text
    • http://evilcheats.fun/jododatesevikix1en.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
    • https://s3.amazonaws.com/pusori/41030182168.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/vewivoxefedasajidoz.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/filmywap_2019_bollywood_movies_housefull_4.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/68471097621.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/fetopir.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/honda_gx160_pressure_washer_with_cat_pump.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/pobuzodijotesagokowefu.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_off00010210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 5212 bytes
SHA-256: f2018ecebf4cf0172c6f85e86102a29f458aea9dca46102bd65a55cc901da67a
font_01_sfnt_off000113b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B8 10256 bytes
SHA-256: 6964bf1815d4139a9fee0e11083a98af464bebd3a6e94a773910457fc1e99d70
font_02_sfnt_off000136e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E5 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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