Malicious PDF — malware analysis report

Static analysis result for SHA-256 636be96480513973…

MALICIOUS

PDF

84.9 KB Created: 2021-03-01 09:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ab64c08dc33ea915895cd9fce26f5245 SHA-1: 9b5d54df40179d5d9c4b27640034c27d88120733 SHA-256: 636be96480513973d8e6b91502bdc29fda347c817260a4ab330f92c019fc4003
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://crophysi.ru/wix?keyword=13+days+in+hell+unblocked+88 PDF link annotation
    • http://leledup.mypressonline.com/how_to_clean_air_filter_in_lawn_mower.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_602e5432f263f.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/bogotaja.pdfIn PDF document text
    • https://zolaverapudo.weebly.com/uploads/1/3/0/8/130874102/668783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_6013a50b638ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489061/normal_5fed4500c69c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fd68bef4a581.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zebofazedixa.rf.gd/kennington_oval_london_weather_report_tomorrow.pdfIn PDF document text
    • http://kodekexonalana.epizy.com/62856931948.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/arangetra_velai_original_bgm.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/duweketafavu.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/bassaleg_school_sixth_form.pdfIn PDF document text
    • http://liwujurepawoweb.rf.gd/9635074747.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/timileve.pdfIn PDF document text
    • http://lerezivopo.rf.gd/44395783913.pdfIn PDF document text
    • http://desejole.myartsonline.com/lulujopinavuxipela.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/regular_aadhar_card_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/zuteluromuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/49477843339.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/87002633662.pdfIn PDF document text
    • http://zerakunutage.epizy.com/32038977590.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/9645538277.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACF 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 5552 bytes
SHA-256: 345920b5a8e7918e19be4692d41e1e18be0d27d2f07ddc8f2679e74b8857e31b
font_02_sfnt_off00010dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAD 10276 bytes
SHA-256: 01a0481102303c11781f4364dd4734ae47e3788643c5a443ccd213a54623724d
font_03_sfnt_off0001311e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311E 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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