Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f301dd7c2126507…

MALICIOUS

PDF

77.0 KB Created: 2021-01-25 15:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 600158a2e3f06a0f0bc024388d1ec232 SHA-1: ef905accb3ed0f92c095362b006774d77145be42 SHA-256: 7f301dd7c2126507d70cf2f5a2a06931fe1fd73c4d838ba72b0e32db5cd82727
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to direct users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were extracted, the presence of numerous external URLs indicates a phishing or link-farming attack pattern.

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://traffset.ru/123?utm_term=candy+list+gluten+free PDF link annotation
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/40e1d1b4f094e9f.pdfIn PDF document text
    • https://lulotabo.weebly.com/uploads/1/3/4/7/134745182/fc63af7f85a3c.pdfIn PDF document text
    • http://hihikane.space/rise_up_bakery_barre_vtlt0zh.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/xerenimolazuz.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/bf57fa5e4ac5f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_5fd317cfbf0dc.pdfIn PDF document text
    • http://idealica-ituficiale.website/thrift_shop_clean_versionzod7w.pdfIn PDF document text
    • https://libuxokoxirafax.weebly.com/uploads/1/3/2/6/132695332/dasop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_60049a0d87cdb.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/96c47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5fcc5dcb7bf87.pdfIn PDF document text
    • http://yogait.space/zofosaxiniracavry.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/tokafanawa/zolumatope.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/nisigegorodi.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/banaras_hindu_university_admit_card_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/25369915358.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/joint_tenancy_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/problem_solving_skills_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/chocolate_peanut_butter_milkshake_sheetz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AE 5080 bytes
SHA-256: 903f2b8b4c42bb6782bdafd7c3a7458a977ee43b3162216d9cf877290faa9603
font_01_sfnt_off0001020f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020F 10720 bytes
SHA-256: 5d053fe6bec3bcdfd9d5346c97e2f73406a2a59a1962c12d33ebb30398e5a309

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