Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa2f65a5f0bffff…

MALICIOUS

PDF

83.6 KB Created: 2021-02-17 04:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b32c14397513ba067774ebc01adaa414 SHA-1: 69cbe3e244bf4a75c2c82335ddaf899909a0df4c SHA-256: 4aa2f65a5f0bffff11604d472f11b66ad39dd2ad8a3a68a692654ba97af85698
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is detected by ClamAV as Pdf.Phishing.Trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/wix?keyword=core+connections+algebra+1+chapter+9+answers+pdf PDF link annotation
    • https://dopapebo.weebly.com/uploads/1/3/4/8/134870178/pasuzejeval_sewuwat_kafufipi.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxopejitin/ejfjdU3/wawitoduwoguxev.pdfIn PDF document text
    • http://universal-kirov.ru/99398947862mwgcg.pdfIn PDF document text
    • https://cdn.sqhk.co/tubawonidas/gjiLmaF/62158510086.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/Sghjbo3/ny_state_parks_explorer_app.pdfIn PDF document text
    • https://zilonuxe.weebly.com/uploads/1/3/1/6/131637529/866f7b98b07.pdfIn PDF document text
    • https://zodoxofavuzawa.weebly.com/uploads/1/3/1/4/131437464/takowezubuziluno.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/aahha53/nintendo_3ds_gold_zelda.pdfIn PDF document text
    • https://fezemopozopedet.weebly.com/uploads/1/3/5/3/135326879/d8443bd6d7.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/dodutegud_wevogosonax_mibomaromobev.pdfIn PDF document text
    • https://darojavanobize.weebly.com/uploads/1/3/4/8/134889586/4914122.pdfIn PDF document text
    • https://cdn.sqhk.co/kurafuso/ebgfjf6/72336153332.pdfIn PDF document text
    • https://duzuvopewawufos.weebly.com/uploads/1/3/4/4/134491429/0f34dc728fdf4.pdfIn PDF document text
    • https://cdn.sqhk.co/lepemafe/I6qhihd/dead_cells_runes.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/b9gdid4/71278571334.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/kCdjgjj/bozelifipajikunazanamibof.pdfIn PDF document text
    • http://metalllift.ru/medical_surgical_nursing_javed_ansarkdzll.pdfIn PDF document text
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/xidizusevarema.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/ab9463.pdfIn PDF document text
    • http://p-kavkaza.ru/65671384495dpt6p.pdfIn PDF document text
    • https://jononosafopobof.weebly.com/uploads/1/3/4/6/134649788/f1541beee1d.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://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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 5668 bytes
SHA-256: fde102975b2e4553b8228a4fda32910eca9a2606203f128c8cf593919b180ccf
font_01_sfnt_off0000f935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 10388 bytes
SHA-256: 2b0196abdccb141b0e5da2c9f493877c82ee0380c78e7d8dd41873ad188ea92a
font_02_sfnt_off00011cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFC 16076 bytes
SHA-256: 1621a87b6bc266bc0e3d5871723ec36fa76dd6d2c9fb76f212020cc469043148
font_03_sfnt_off000131aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361