Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a044f8d6f9506a7…

MALICIOUS

PDF

73.3 KB Created: 2021-03-16 07:51:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b49506c93992fb243d29bfe1dbeb5b9e SHA-1: e9457e61ef2f5b664881ad4ff9e8a081ef444fea SHA-256: 4a044f8d6f9506a7ea67114975aa7a1d225ea6171edf55a98ebc77ea98f55f8c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://kuzutuzo.ru/wix?keyword=lapua+reloading+manual+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409246/normal_5fdb1b1d1b03f.pdfIn PDF document text
    • http://suzupuwejal.mygamesonline.org/unidad_1_etapa_2_ws3_answers.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/what_is_a_literature_review_psychology.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/wamefilinalepofot.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/free_ethical_hacking_course_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419452/normal_601e107720d62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5fdc424bd9967.pdfIn PDF document text
    • http://roduvogixaxo.66ghz.com/align_chakras_guided_meditation.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/az_900_book_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459936/normal_5fcc8dbb7d11c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460981/normal_600e0d67b8845.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giworutiw.myartsonline.com/79377451715.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/google_spreadsheet_macro_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/breville_coffee_machine_bes860_manual.pdfIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_c56a268e4a5244faa6b83e16d5de2d0a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/avatharam_song_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/jon_bon_jovi_albums_free.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_23b256f3ef014cccb5f54546d15e5495.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/how_to_read_egypt.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/zoxemegafokin.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_off0000e0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 5040 bytes
SHA-256: 28540a2e03d889a2044ac806e608fb62758c34e6635cdd5d9bfc712661641881
font_01_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 11284 bytes
SHA-256: 38bc29b130acf1b3c6c6367c60852cf25833b87329c0d4ac5f3b12632b6ec12f

Open this report in the interactive analyzer, or submit your own file for analysis.