Malicious PDF — malware analysis report

Static analysis result for SHA-256 052ddf36eff26a51…

MALICIOUS

PDF

76.9 KB Created: 2021-06-01 20:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aa55d102140a08ab8a00accdc50d6b73 SHA-1: 72400c4e1bce1b2ca33ecc07a7e214aa28c7f83a SHA-256: 052ddf36eff26a51e0e855bd4774b3711712ebc4af9914f6407ff07f75aae847
186 Risk Score

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 0.9991

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://huntic.ru/pbw?utm_term=unable+to+establish+a+wireless+data+connection+mip+67 PDF link annotation
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/aff2542.pdfIn PDF document text
    • https://juvuxoxeziw.weebly.com/uploads/1/3/4/3/134313380/1ebdbbe8.pdfIn PDF document text
    • https://bovefunovowuto.weebly.com/uploads/1/3/0/8/130873908/volazusinemire_nixalifu_wixekodorevo.pdfIn PDF document text
    • https://xozoravupot.weebly.com/uploads/1/3/4/3/134314106/potipobudif_vasatepamubaf.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/bawaga.pdfIn PDF document text
    • https://gavuvikiji.weebly.com/uploads/1/3/4/6/134674568/9370122.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/doposife.pdfIn PDF document text
    • https://vesilaxevi.weebly.com/uploads/1/3/4/7/134735958/8820422.pdfIn PDF document text
    • https://kupubasurunasoz.weebly.com/uploads/1/3/4/6/134695217/tabaxezegelibe_wakufoli.pdfIn PDF document text
    • https://fupiwopogewexab.weebly.com/uploads/1/3/4/5/134506550/ravevosilerakevipure.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/mofolopixisazivat.pdfIn PDF document text
    • https://litiwufedoza.weebly.com/uploads/1/3/0/7/130739575/5255759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_602e5c9139261.pdfIn PDF document text
    • https://wesofozuxo.weebly.com/uploads/1/3/4/2/134266961/sufuririkukaf-mipozanenenifa-dixataw.pdfIn PDF document text
    • https://lorotorerusut.weebly.com/uploads/1/3/1/4/131452969/9016615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_6036d9fe4c425.pdfIn PDF document text
    • https://kodalisurodufe.weebly.com/uploads/1/3/2/6/132680932/pidogeladul_nogarolilolofe_ruxokababif.pdfIn PDF document text
    • https://wokozizexufam.weebly.com/uploads/1/3/4/2/134234926/sifubonej_nuxowa.pdfIn PDF document text
    • https://deronabopopunol.weebly.com/uploads/1/3/4/7/134728657/mugisekibozuwaturino.pdfIn PDF document text
    • https://sawasorepe.weebly.com/uploads/1/3/0/7/130739445/fegebafemakixu.pdfIn PDF document text
    • https://jabezenenadako.weebly.com/uploads/1/3/4/2/134234778/xajezowukevalip.pdfIn PDF document text
    • https://lonirukigosoz.weebly.com/uploads/1/3/5/9/135965403/ba9b60e4bf122.pdfIn PDF document text
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/5cdc9.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/zudixapumu-miviv-jefekamepavig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_600b695f514f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5768 bytes
SHA-256: d3f11d1e58bfa0c917a738dede80e5d6d9643fcb4e646395a52e0fc54f261e57
font_01_sfnt_off00010064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10064 11004 bytes
SHA-256: 4014f8d3de40a76f33e068f0bc7e36a4fa875735f4b97b25535adf0bdb9cea5a