Malicious PDF — malware analysis report

Static analysis result for SHA-256 6724d0dca1dec72c…

MALICIOUS

PDF

95.0 KB Created: 2021-03-12 17:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a2ae9df7e0ae48380cc435b81ee33c81 SHA-1: 2ab3bba0b47db8ae5c50c7e58c05f3ea86ca362c SHA-256: 6724d0dca1dec72ca8126287c95bf59b2f970581ca7b5ce0f99f4b85ad5e4a0b
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 0.9997

Heuristics 6

  • 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 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://botokaw.ru/wix?keyword=gumiho+tale+of+the+fox%2527s+child+ending PDF link annotation
    • http://kajuzumanaz.sportsontheweb.net/jafomuguzu.pdfIn PDF document text
    • https://rodusebit.weebly.com/uploads/1/3/0/8/130874039/fogaxumamujuk-rapiz-bakemuvi.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/8182503.pdfIn PDF document text
    • http://garobunatuxovi.scienceontheweb.net/the_chocolate_war_movie_cast.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/7206989.pdfIn PDF document text
    • https://zadukali.weebly.com/uploads/1/3/5/3/135340438/6398012.pdfIn PDF document text
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/livobi.pdfIn PDF document text
    • https://bozaveruri.weebly.com/uploads/1/3/1/4/131483492/9049452.pdfIn PDF document text
    • https://zamamuxito.weebly.com/uploads/1/3/4/2/134234866/b69b22bb5fcb2.pdfIn PDF document text
    • http://kobazugipodiv.medianewsonline.com/15100733142.pdfIn PDF document text
    • http://xarapover.mygamesonline.org/bekuwomef.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://uploads.strikinglycdn.com/files/c10e2a8d-1b0d-4b8a-a976-35ba6a82ee1b/kugob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04ec38f7-8979-4bb1-921c-cb7a22f09d45/bigoxazowepimadegevivew.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/gay_love_story_books_read_online.pdfIn PDF document text
    • http://piwolimosopobu.myartsonline.com/familia_enterobacterias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38ba69f-849e-447b-a174-ec8c2de6f6ce/sagemcom_fst_5260cv_review.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/descargar_plague_inc_premium_apk_2019_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/peroxegapomik.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/sharp_lc-60le650u_backlight.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/savivivepesuse.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_off00012b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B87 5356 bytes
SHA-256: 47329d3837684a32bb1b7e275cf43bca7418c52efc90a39c95d4863e98928dc1
font_01_sfnt_off00013da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA8 10020 bytes
SHA-256: 148ab648a47901b5ba99a7f8d99819b46f5cc6c57054531169bd3f2919e808e9
font_02_sfnt_off00015ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FFE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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