Malicious PDF — malware analysis report

Static analysis result for SHA-256 28418846540c8fce…

MALICIOUS

PDF

78.0 KB Created: 2021-03-16 07:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: af0d36d086cb97a8925d0309c41fbd37 SHA-1: 704e356464717d23034c83ec7368b592464dfc5b SHA-256: 28418846540c8fce2b957f0ab03e46e12078c5593113941837acac5b992494c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it acts as a lure to redirect users to potentially malicious sites. The PDF structure and embedded URIs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/wix?keyword=rats+in+attic PDF link annotation
    • https://fikosaxan.weebly.com/uploads/1/3/4/7/134753192/1daa31.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/Phihegh/66867038399.pdfIn PDF document text
    • http://gladkoe-telo.xyz/how_to_change_date_on_canon_mp11dx_calculatorz8i9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_5fea22d088837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5ff9aa6c51035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483842/normal_5fe03febc94d5.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/jf1ghaU/gegeduveguxibononarusuv.pdfIn PDF document text
    • http://axecheat9.xyz/vocabulary_words_with_meaning_in_tamil7okkz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_602dee8c221c6.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/e1761.pdfIn PDF document text
    • https://rawuwivusezorom.weebly.com/uploads/1/3/1/4/131406564/nuzexep.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/brother_mfc_7360n_driver3vusa.pdfIn PDF document text
    • http://my-favshopc.online/59980006265jc5df.pdfIn PDF document text
    • https://cdn.sqhk.co/daviwiloma/qx5dZhf/dreamweaver_for_windows_10_64_bit.pdfIn PDF document text
    • https://xodukibefapox.weebly.com/uploads/1/3/0/8/130873769/88b6c72e29eac6b.pdfIn PDF document text
    • http://businesshelpservice.com/ginipumazeduvafofekiwdhmu.pdfIn PDF document text
    • http://shoop-fg.ru/conditional_probability_independent_practice_worksheet_answersscyxc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_6022cdaf30dc9.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/sisaxu/blessed_names_and_attributes_of_allah.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/puvudobejixe.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/asic_accc_debt_collection_guidelines.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 4672 bytes
SHA-256: 57a20c59de99d2a359fcf3cf051096a5efae4ccd7ee8c430497b7cf26c0ca35b
font_01_sfnt_off00010603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 10792 bytes
SHA-256: 1b7ba7413e073879e44f53204c8a1f061fb65fd234b2d6c8f2d782f6fdae3c49

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