Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a76acc5bcf9fc19…

MALICIOUS

PDF

83.6 KB Created: 2021-05-04 09:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 609e455815322459f054285ff885f707 SHA-1: bd750cbe61aeee201a49d347e2eebd9ec05ccb2c SHA-256: 1a76acc5bcf9fc19e9abdb3b44ffa1f4a0ac93df6a390ddc410118c1ce0bc9fa
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://maypoin.ru/strik?utm_term=mxr+10+band+eq+power+supply PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383308/normal_600fa08283885.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/cross_currency_swap.pdfIn PDF document text
    • http://reduslim-sitoufficiale.site/games_cheat_codes_for_android_and_iosz2iia.pdfIn PDF document text
    • http://zoomita.space/rusunebosdcj4a.pdfIn PDF document text
    • http://arboozfilm.com/technical_analysis_books_in_hindi4wz1e.pdfIn PDF document text
    • http://canonsburglake.com/davunaluzobazamamuxegoxof1rax4.pdfIn PDF document text
    • http://zimejitudik.iblogger.org/7687506068.pdfIn PDF document text
    • http://rodsfish.club/2361533988b1ym5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428331/normal_606940da42612.pdfIn PDF document text
    • http://nateribebomulaz.medianewsonline.com/the_norton_anthology_of_short_fiction_shorter_8th_edition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_603b6a98a4338.pdfIn PDF document text
    • http://zafikapasipugog.medianewsonline.com/atomic_structure_and_the_periodic_table.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_60369d7876b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_601e58a29f500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481056/normal_5fcc2b4019f1f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuminexozuvino.atwebpages.com/jalabevokamawo.pdfIn PDF document text
    • http://pokajuvetu.rf.gd/-_conjugated_nickel_bis_dithiolene_complex_nanosheet.pdfIn PDF document text
    • http://gabifuzof.rf.gd/albeniz_sevilla_guitar.pdfIn PDF document text
    • http://nupowabel.rf.gd/indices_questions_gcse_worksheet.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_off0001084a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084A 5680 bytes
SHA-256: 27c24f423f6402c76736d5050cf5d49da7a74126c4b53b2be3a8335da200fac5
font_01_sfnt_off00011bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC7 11008 bytes
SHA-256: 792d45c918988f4f9b253e27c418d6459d58a097d10ed0d745d1382597294da1

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