Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd6928072dbb8f1…

MALICIOUS

PDF

73.9 KB Created: 2021-06-11 09:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c54256e85761546fcbfaeb7e8a3f0202 SHA-1: 10e8db826a5b7b141f13f71e554156248ee4cd34 SHA-256: 1fd6928072dbb8f11926c1406762245d75ce99e9b79042398eebe424083b00e1
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 0.9991

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://infrive.ru/pbw?utm_term=watch+deadpool+online+123movies PDF link annotation
    • https://nolomiwasuwizug.weebly.com/uploads/1/3/4/6/134661688/biladoler_datomarurosa_fozofuxamogiwo.pdfIn PDF document text
    • https://ziwirekow.weebly.com/uploads/1/3/4/5/134529616/nifedapurokixos_jawowowipemita_dibepisew_danibope.pdfIn PDF document text
    • https://sidagavaru.weebly.com/uploads/1/3/2/8/132814791/7409831.pdfIn PDF document text
    • https://pujuxapalijened.weebly.com/uploads/1/3/6/0/136009243/e2fc15980583aa.pdfIn PDF document text
    • https://ridegagix.weebly.com/uploads/1/3/4/6/134668883/mepuwumapetevugo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_6047aa6938de0.pdfIn PDF document text
    • https://jopokoguse.weebly.com/uploads/1/3/0/8/130874396/delewelulak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477655/normal_600499e2db822.pdfIn PDF document text
    • https://bogijaxik.weebly.com/uploads/1/3/2/6/132682919/nonafivutegov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_605fb7c9ee799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388174/normal_6022933d8ee5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e70267-ed54-44aa-9b37-62a69ad692ac/how_can_i_reset_my_craftsman_garage_door_opener_keypad.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/w/file/fetch/145087149/xupet.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/145087671/webmail_bhrc_org.pdfIn PDF document text
    • http://lujugusoderu.pbworks.com/w/file/fetch/145002576/xevufizipedonuwuxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab7386f-c6b9-4a38-adde-08bc078713de/78335430069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1045cb34-4af4-4b84-b12f-5e410dfd6be5/class_9_social_science_guide.pdfIn PDF document text
    • http://jetubabup.pbworks.com/w/file/fetch/144783714/piwukafekudavapufemofi.pdfIn PDF document text
    • http://giribuv.pbworks.com/f/95750264648.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144470610/lusafedefi.pdfIn PDF document text
    • http://luwivaj.pbworks.com/f/b1_level_english_test_equivalent.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144431463/1999_ford_ranger_xlt_4x4_4.0_towing_capacity.pdfIn PDF document text
    • http://wixugigir.pbworks.com/w/file/fetch/144669915/nivuxatagupiwif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ca4e6c-4654-4658-b0f5-75fced09a902/bazukuvimunupinopenejogex.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_off0000e18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18F 5640 bytes
SHA-256: b0e869dfef4f0b8e59992903d77e4eb9168d2890b9f02a47b91a0f18f1cbee41
font_01_sfnt_off0000f4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AF 11004 bytes
SHA-256: 593414dbdce82d078cf279e05f02a1d376b5f727c69b4d341f462cb8fd36c138

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