Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e01731ee0642a1…

MALICIOUS

PDF

73.0 KB Created: 2021-03-17 13:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2db80275614fd269918abaa036086d07 SHA-1: 639d64d3546cc3dced2a1f0c0fd0d83f8503cf27 SHA-256: 34e01731ee0642a12915a79997923ced2c0498c2a6c7323e8fa8ced33d1275cf
186 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 0.9998

Heuristics 6

  • 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.
  • 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://pelibifir.ru/123?utm_term=trattoria+la+cicala+e+la+formica+roma PDF link annotation
    • https://nelizebowi.weebly.com/uploads/1/3/4/7/134734992/pejejuzovodem.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/bagisisurelarivobu.pdfIn PDF document text
    • http://tikovg.xyz/tozaxefiwajujazupulematamgfsab.pdfIn PDF document text
    • http://zofunubesosena.mypressonline.com/biology_textbook_grade_10-12.pdfIn PDF document text
    • https://bitokulizawefe.weebly.com/uploads/1/3/4/6/134684274/5164813.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/when_does_dragon_ball_z_kakarot_dlc_2_come_out.pdfIn PDF document text
    • http://sedouche.xyz/dajenukuzakuznspku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2e5cbe44-7de3-4e3f-b94c-8a8567814465.filesusr.com/ugd/f96b02_4f5c0da982fa4322b35c576454700939.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faxaxos/89336879271.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/how_to_learn_python_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d6778c-23ec-41bf-bd47-f119f5a72cb7/80252680851.pdfIn PDF document text
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_b4e819e41ce549e5b5508c5aa5fbe1ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/kiwuguxozikipefimifuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17985b1-d32d-471e-8305-58b6c1f50f4b/36591274123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b55a9cb-d66f-48bb-9c45-17128b6f4588/jiloxifolefajejefoboti.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/articles_grammar_exercises.pdfIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_111d9f4b4c4d4db1b96b8e4d5afcc5de.pdf?index=trueIn PDF document text
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_ac1288678eef49c9876f9e3bd5b36dea.pdf?index=trueIn PDF document text
    • https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_7d7777d26dab4bf0a290ed57792f209b.pdf?index=trueIn 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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 4800 bytes
SHA-256: 962cf95e1ab34213beb9958a27e47f76d0250979b30a1827aa200ecd7ad47ea5
font_01_sfnt_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 11496 bytes
SHA-256: ffeb9cf5eecc98dac6068b6c191552f8d6e09a5a0468a677820a2f6d7fa499fa

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