Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7690c09d394d6fc…

MALICIOUS

PDF

80.8 KB Created: 2021-03-18 04:57:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e7de714e98c8186c7a952d9055d9cfdf SHA-1: 9e398206a397576cccbb3b9fedc37fb8c221c1b4 SHA-256: e7690c09d394d6fc9c50b36cbedfc0fd47db5158997ad71dc4921de139e348b9
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 0.9998

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 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://mezovuduw.ru/strik?utm_term=les+mis%25C3%25A9rables+original+movie+1957 PDF link annotation
    • http://gezinuloxi.22web.org/xijujozupajamujinureg.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/93803357849.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/facial_diagnosis_of_cell_salt_deficiencies.pdfIn PDF document text
    • http://jajolamuseku.medianewsonline.com/4528647944.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_3dbcabc1c6bb4311b9ab0eb4636e6848.pdf?index=trueIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_10101a74388f433b9d30c2c7603abafe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/workbook_answers_of_daffodils_icse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d36bd9-804f-4390-95fe-979f629512b9/ncert_maths_book_class_8_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/196b523f-6489-43cc-9f6b-007c5eb99897/carbs_in_a_taco_bell_taco_salad_no_shell.pdfIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_bfdbd292f2874e0f9f0be0be1364059d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6818ce62-c4ea-407b-8a03-f8cc4ef52343/dipisarepakelakewenok.pdfIn PDF document text
    • http://zetitovafe.rf.gd/60183090461.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/career_chart_after_12th_commerce.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_fdd6d3e9269f4aae82559761120b00ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/ginosezaf.pdfIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_b6dd7ff60f8242deb27af108e9339f93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/myron_mixon_rib_spritz.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/tebeladabo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 5408 bytes
SHA-256: 5caaffb9c653ffda41efb9b777e5fc2dbf64ba766caa3b567978e43fb06e9c51
font_01_sfnt_off000100b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B0 11028 bytes
SHA-256: 23284e4e4118349ea8c03f66ab915d370b0db8e06c7c83749f18ec29601b6ba7
font_02_sfnt_off000125c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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