Malicious PDF — malware analysis report

Static analysis result for SHA-256 007726571acf0fbc…

MALICIOUS

PDF

81.1 KB Created: 2021-03-26 05:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b567a976b4f11cbea71d63f408fb2ba1 SHA-1: 43a9579fc5f48eb589173d44e0d122213a0b659f SHA-256: 007726571acf0fbcafdefc88ee024b66591601d80b95305d8e26a99535f254aa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, characteristic of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://vilenefex.ru/123?utm_term=abc+colouring+pdf PDF link annotation
    • http://tazibesemelegi.iblogger.org/vodukitel.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/wd_my_cloud_admin_log_in.pdfIn PDF document text
    • https://juwulonureli.weebly.com/uploads/1/3/2/8/132815178/3751843.pdfIn PDF document text
    • http://weraka.online/antropoloji_anadolu_niversitesieqezf.pdfIn PDF document text
    • http://mpvideo.org/zujezopoxenegorizoxipuu7do.pdfIn PDF document text
    • https://kelebewo.weebly.com/uploads/1/3/4/3/134359650/0adf95ab.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/risk_management_in_banks_books.pdfIn PDF document text
    • https://bumudipokipilu.weebly.com/uploads/1/3/4/3/134350227/5023015.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/58b9fb2dc1ef.pdfIn PDF document text
    • http://matteset-spon.space/identifying_proportional_relationships_worksheetqbtdz.pdfIn PDF document text
    • http://fesunasisodenod.getenjoyment.net/el_hombre_mas_rico_de_babilonia_resumen_cap_1.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/arithmetic_reasoning_tricks.pdfIn PDF document text
    • http://erse.xyz/zijekix7y2g0.pdfIn PDF document text
    • https://wepizowo.weebly.com/uploads/1/3/0/8/130813330/2577231.pdfIn PDF document text
    • http://instahelpforbusiness.com/short_blog_template_aminoqigfw.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
    • http://zutaturusix.myartsonline.com/96053704300.pdfIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_2b7fef62f60d4a679cc1a00b9072eddb.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_1a94461666ec4f639b3c27edd21d623e.pdf?index=trueIn PDF document text
    • http://bojepudadadax.atwebpages.com/falajebamiwaxagidal.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/rinnai_infinity_20_installation_price.pdfIn PDF document text
    • http://lepejifilafimif.rf.gd/pijimidilanutesitijifox.pdfIn PDF document text
    • http://xasagode.myartsonline.com/bavezimuvigivu.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_cb7c024bac104ab79585fc8ea1bc5c28.pdf?index=trueIn 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_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 4748 bytes
SHA-256: 7cf24e8fcf179b605a16445218abac3821545e3c42dfd18d2103ef9772e7ba39
font_01_sfnt_off000103cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CC 10952 bytes
SHA-256: 6a4fb00a7b20589d3d6c92704f3ad657d565a8cb406aeb798598135e403f25be
font_02_sfnt_off000128ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128ED 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361