Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32d1e7fa2e5cdb4…

MALICIOUS

PDF

62.9 KB Created: 2021-02-10 19:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 20b2312e58570b441871934e940277fc SHA-1: e49a48c79140611770a39cb3a468e365b6eb34f8 SHA-256: a32d1e7fa2e5cdb4d308fbd12192f162935155b663b0de5cd9088cfeaff9cf0f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing campaign. The primary malicious URL identified is https://leonvi.ru/123?utm_term=ultimate+body+press+xl, which is likely used to redirect the user to a malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/123?utm_term=ultimate+body+press+xl PDF link annotation
    • https://wewofubajibopa.weebly.com/uploads/1/3/1/3/131381003/1cc13864d53.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/2773541.pdfIn PDF document text
    • https://sidatugalelukad.weebly.com/uploads/1/3/4/6/134639108/08f29f155.pdfIn PDF document text
    • https://wedidosav.weebly.com/uploads/1/3/1/6/131637371/ratabawoxati.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/ibJ4cHe/51133317586.pdfIn PDF document text
    • https://baxovazexozubuv.weebly.com/uploads/1/3/4/3/134318553/5162964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_6017027a987d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475406/normal_5ff0720118f7b.pdfIn PDF document text
    • https://jawifeguviweti.weebly.com/uploads/1/3/2/3/132302916/jerojutoxog.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/03Fly1E/electric_pro_li_outliner_clippers.pdfIn PDF document text
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/jefero-giwibun.pdfIn PDF document text
    • https://legobunisazej.weebly.com/uploads/1/3/4/5/134501617/1253188.pdfIn PDF document text
    • https://motabuwupogofe.weebly.com/uploads/1/3/1/6/131607229/4495901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498702/normal_5fdde7067a720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5fd787d922799.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/muvazi/online_enrolment_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/vejimuxibelanu.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/tubisob.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/capitalized_balance_sheet_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/charminar_movie_kannada_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/audit_report_opinion_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/19778078980.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/hp_elitebook_8470p_fingerprint_driver.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_off0000bbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD9 5408 bytes
SHA-256: 4cbf313b67a95f518f77d4b73cdea5208361661081585d40b32050d5a659ef3d
font_01_sfnt_off0000ce20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE20 9440 bytes
SHA-256: e9dc15ca33b0846503bea6056460439541438aaf48052db5208d1230a89195c4

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