Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5575ca13d76a410…

MALICIOUS

PDF

89.7 KB Created: 2020-11-24 19:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 8ba8ed8840ed6a1967da49eaee5bb137 SHA-1: d246254ce2ebe11a8ce9faccb4bcc6cbe8e317f2 SHA-256: b5575ca13d76a4105985ad94c33fc499678f5352275c527eb18d38e4d44df8c3
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 0.9996

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://traffine.ru/strik?utm_term=aci+318-14+pdf+%25D8%25AF%25D8%25A7%25D9%2586%25D9%2584%25D9%2588%25D8%25AF PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/nidisetati.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/bf0c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_5f9a74b7d3aa2.pdfIn PDF document text
    • https://sopowifumerage.weebly.com/uploads/1/3/4/3/134355846/toropawipiwumevexeme.pdfIn PDF document text
    • https://boleturem.weebly.com/uploads/1/3/4/3/134398498/b0f8d1b.pdfIn PDF document text
    • https://tuxixomapom.weebly.com/uploads/1/3/4/6/134631546/lobisosufelila-bemutovo.pdfIn PDF document text
    • https://xovozenoz.weebly.com/uploads/1/3/4/3/134348708/a73bd8708cdf.pdfIn PDF document text
    • https://rakamukomegu.weebly.com/uploads/1/3/2/6/132681656/405102.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/fogejurusape-polajowefuv-fivot.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/5765613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393041/normal_5f93eb72c3cb7.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/tevigotu/approaches_to_learning_and_teaching_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/77684032380.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/english_year_5_sjk_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/vusasotesegopifu.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/rinitileb.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012394.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12394 28172 bytes
SHA-256: db5414240ca317204c639ff1368115e9fa235c937da032054f56b87db366302e
font_00_sfnt_off0000d812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD812 5152 bytes
SHA-256: 3f37e72f802eb3f3caa0a79b1f6d7dca3b188a85bc1dde5df13ba422253b7a69
font_01_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 10340 bytes
SHA-256: e56368380d10c9c95c39e70c45c64f3406d2d52d55552a0fd50300d86763bd9e
font_02_sfnt_off00010ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE7 16496 bytes
SHA-256: 69a730b8487052aa41eabefbd7e0df7cb2f9e0b27ea8499d5fe592cc541ae512

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