Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed257e3627041c62…

MALICIOUS

PDF

74.0 KB Created: 2021-06-05 17:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c30a22d551cb0b7bf266f3257889cdcf SHA-1: 982b9f54102513ff1a9902ec2881d74cce6795f0 SHA-256: ed257e3627041c6232d000eb7ecad13077d37f7b7853008e37ab184c19ae464c
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://chcial.ru/pbw?utm_term=are+nike+leggings+true+to+size PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469350/normal_5ff18e2ebbd24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_60674b486f942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491164/normal_6017245797881.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144502680/how_to_connect_dymo_labelwriter_450_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236a4d37-80e6-4035-a9af-e5639830ff90/what_causes_neonatal_jaundice_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bffc732-943f-406a-a678-33c52e27385c/how_did_haiti_get_its_independence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84a4a855-2b86-4d68-8ec2-81c4a8fcc6b6/black_and_decker_weed_eater_cordless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71b2e3e-7a45-426f-8fa2-df676dac1857/book_of_runes_ralph_blum.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/f/bulemakatuzumitida.pdfIn PDF document text
    • http://jolunatimavu.pbworks.com/f/how_to_find_centroid_of_irregular_shape_in_autocad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e2cdb2-0aaa-43d0-a8a0-8517550a4113/ernie_ball_volume_vp_jr_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0333d730-9377-46bd-a053-a3d046c6f2fe/kalender_2021_cdr_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119f641b-e913-4ed9-a4d4-dfc75601cfc2/86078987801.pdfIn PDF document text
    • http://xetibubib.pbworks.com/f/como_poner_trucos_en_gta_san_andreas_para_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965f1cc7-a0a1-4e5d-bf4a-968c3db919cc/how_to_put_yamaha_moto_4_in_reverse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96aa1336-8fb8-43f3-850b-5d0f28d8992f/sdata_tool_free_download_for_pc_softonic.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/w/file/fetch/144561759/salopexitobukamamazol.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/35907509179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80349737-b792-4a80-adb2-c4e92510f0c4/tofubabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6187ddd6-c254-414d-9fae-5b3f3f0540ba/53355230101.pdfIn PDF document text
    • http://vadibun.pbworks.com/f/contextos_leccion_2_crossword_answers.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_off0000e4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A8 4748 bytes
SHA-256: bb6e91aeecf6a23f334f6230c5361ca48a875a0696f034bd0b6b560117b75070
font_01_sfnt_off0000f4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 11148 bytes
SHA-256: be609e4a7cf373cff6a29c9e498b00b99b5b3e80c2d118b63f1945d5ef1b6908

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